[ConstraintElim] Add tests for mul nsw and signed predicates.

1 files changed, 758 insertions, 0 deletions

diff --git a/llvm/test/Transforms/ConstraintElimination/mul-nsw.ll b/llvm/test/Transforms/ConstraintElimination/mul-nsw.ll
new file mode 100644
index 0000000..45d4f79
--- /dev/null
+++ b/llvm/test/Transforms/ConstraintElimination/mul-nsw.ll
@@ -0,0 +1,758 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s
+
+declare void @use(i1)
+declare void @llvm.assume(i1)
+
+define void @slt_mul_nsw_3_known_positive(i8 %start, i8 %high) {
+; CHECK-LABEL: @slt_mul_nsw_3_known_positive(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], 3
+; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
+; CHECK-NEXT:    [[C_2:%.*]] = icmp sgt i8 [[START]], 0
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK:       then:
+; CHECK-NEXT:    [[T_0:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_0]])
+; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], 1
+; CHECK-NEXT:    [[T_1:%.*]] = icmp slt i8 [[START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_1]])
+; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], 2
+; CHECK-NEXT:    [[T_2:%.*]] = icmp slt i8 [[START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_2]])
+; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], 3
+; CHECK-NEXT:    [[T_3:%.*]] = icmp slt i8 [[START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_3]])
+; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], 4
+; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_3]])
+; CHECK-NEXT:    ret void
+; CHECK:       else:
+; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_4]])
+; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], 1
+; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_5]])
+; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], 2
+; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_6]])
+; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], 3
+; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_7]])
+; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], 4
+; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_8]])
+; CHECK-NEXT:    ret void
+;
+entry:
+  %mul.3  = mul nsw i8 %start, 3
+  %c.1 = icmp slt i8 %mul.3, %high
+  %c.2 = icmp sgt i8 %start, 0
+  %and = and i1 %c.1, %c.2
+  br i1 %and, label %then, label %else
+
+then:
+  %t.0 = icmp slt i8 %start, %high
+  call void @use(i1 %t.0)
+  %start.1 = mul nsw i8 %start, 1
+  %t.1 = icmp slt i8 %start.1, %high
+  call void @use(i1 %t.1)
+  %start.2 = mul nsw i8 %start, 2
+  %t.2 = icmp slt i8 %start.2, %high
+  call void @use(i1 %t.2)
+  %start.3 = mul nsw i8 %start, 3
+  %t.3 = icmp slt i8 %start.3, %high
+  call void @use(i1 %t.3)
+  %start.4 = mul nsw i8 %start, 4
+  %c.3 = icmp slt i8 %start.4, %high
+  call void @use(i1 %c.3)
+  ret void
+
+else:
+  %c.4 = icmp slt i8 %start, %high
+  call void @use(i1 %c.4)
+  %else.start.1 = mul nsw i8 %start, 1
+  %c.5 = icmp slt i8 %else.start.1, %high
+  call void @use(i1 %c.5)
+  %else.start.2 = mul nsw i8 %start, 2
+  %c.6 = icmp slt i8 %else.start.2, %high
+  call void @use(i1 %c.6)
+  %else.start.3 = mul nsw i8 %start, 3
+  %c.7 = icmp slt i8 %else.start.3, %high
+  call void @use(i1 %c.7)
+  %else.start.4 = mul nsw i8 %start, 4
+  %c.8 = icmp slt i8 %else.start.4, %high
+  call void @use(i1 %c.8)
+  ret void
+}
+
+define void @slt_mul_no_nsw_3_known_positive(i8 %start, i8 %high) {
+; CHECK-LABEL: @slt_mul_no_nsw_3_known_positive(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[MUL_3:%.*]] = mul i8 [[START:%.*]], 3
+; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
+; CHECK-NEXT:    [[C_2:%.*]] = icmp sgt i8 [[START]], 0
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK:       then:
+; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_3]])
+; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], 1
+; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_4]])
+; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], 2
+; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_5]])
+; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], 3
+; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_6]])
+; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], 4
+; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_7]])
+; CHECK-NEXT:    ret void
+; CHECK:       else:
+; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_8]])
+; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], 1
+; CHECK-NEXT:    [[C_9:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_9]])
+; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], 2
+; CHECK-NEXT:    [[C_10:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_10]])
+; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], 3
+; CHECK-NEXT:    [[C_11:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_11]])
+; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], 4
+; CHECK-NEXT:    [[C_12:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_12]])
+; CHECK-NEXT:    ret void
+;
+entry:
+  %mul.3  = mul i8 %start, 3
+  %c.1 = icmp slt i8 %mul.3, %high
+  %c.2 = icmp sgt i8 %start, 0
+  %and = and i1 %c.1, %c.2
+  br i1 %and, label %then, label %else
+
+then:
+  %c.3 = icmp slt i8 %start, %high
+  call void @use(i1 %c.3)
+  %start.1 = mul nsw i8 %start, 1
+  %c.4 = icmp slt i8 %start.1, %high
+  call void @use(i1 %c.4)
+  %start.2 = mul nsw i8 %start, 2
+  %c.5 = icmp slt i8 %start.2, %high
+  call void @use(i1 %c.5)
+  %start.3 = mul nsw i8 %start, 3
+  %c.6 = icmp slt i8 %start.3, %high
+  call void @use(i1 %c.6)
+  %start.4 = mul nsw i8 %start, 4
+  %c.7 = icmp slt i8 %start.4, %high
+  call void @use(i1 %c.7)
+  ret void
+
+else:
+  %c.8 = icmp slt i8 %start, %high
+  call void @use(i1 %c.8)
+  %else.start.1 = mul nsw i8 %start, 1
+  %c.9 = icmp slt i8 %else.start.1, %high
+  call void @use(i1 %c.9)
+  %else.start.2 = mul nsw i8 %start, 2
+  %c.10 = icmp slt i8 %else.start.2, %high
+  call void @use(i1 %c.10)
+  %else.start.3 = mul nsw i8 %start, 3
+  %c.11 = icmp slt i8 %else.start.3, %high
+  call void @use(i1 %c.11)
+  %else.start.4 = mul nsw i8 %start, 4
+  %c.12 = icmp slt i8 %else.start.4, %high
+  call void @use(i1 %c.12)
+  ret void
+}
+
+define void @slt_mul_nsw_3_not_known_positive(i8 %start, i8 %high) {
+; CHECK-LABEL: @slt_mul_nsw_3_not_known_positive(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[MUL_3:%.*]] = mul i8 [[START:%.*]], 3
+; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
+; CHECK-NEXT:    br i1 [[C_1]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK:       then:
+; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_3]])
+; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], 1
+; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_4]])
+; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], 2
+; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_5]])
+; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], 3
+; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_6]])
+; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], 4
+; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_7]])
+; CHECK-NEXT:    ret void
+; CHECK:       else:
+; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_8]])
+; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], 1
+; CHECK-NEXT:    [[C_9:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_9]])
+; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], 2
+; CHECK-NEXT:    [[C_10:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_10]])
+; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], 3
+; CHECK-NEXT:    [[C_11:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_11]])
+; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], 4
+; CHECK-NEXT:    [[C_12:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_12]])
+; CHECK-NEXT:    ret void
+;
+entry:
+  %mul.3  = mul i8 %start, 3
+  %c.1 = icmp slt i8 %mul.3, %high
+  br i1 %c.1, label %then, label %else
+
+then:
+  %c.3 = icmp slt i8 %start, %high
+  call void @use(i1 %c.3)
+  %start.1 = mul nsw i8 %start, 1
+  %c.4 = icmp slt i8 %start.1, %high
+  call void @use(i1 %c.4)
+  %start.2 = mul nsw i8 %start, 2
+  %c.5 = icmp slt i8 %start.2, %high
+  call void @use(i1 %c.5)
+  %start.3 = mul nsw i8 %start, 3
+  %c.6 = icmp slt i8 %start.3, %high
+  call void @use(i1 %c.6)
+  %start.4 = mul nsw i8 %start, 4
+  %c.7 = icmp slt i8 %start.4, %high
+  call void @use(i1 %c.7)
+  ret void
+
+else:
+  %c.8 = icmp slt i8 %start, %high
+  call void @use(i1 %c.8)
+  %else.start.1 = mul nsw i8 %start, 1
+  %c.9 = icmp slt i8 %else.start.1, %high
+  call void @use(i1 %c.9)
+  %else.start.2 = mul nsw i8 %start, 2
+  %c.10 = icmp slt i8 %else.start.2, %high
+  call void @use(i1 %c.10)
+  %else.start.3 = mul nsw i8 %start, 3
+  %c.11 = icmp slt i8 %else.start.3, %high
+  call void @use(i1 %c.11)
+  %else.start.4 = mul nsw i8 %start, 4
+  %c.12 = icmp slt i8 %else.start.4, %high
+  call void @use(i1 %c.12)
+  ret void
+}
+
+define void @slt_mul_nsw_neg_3_known_negative(i8 %start, i8 %high) {
+; CHECK-LABEL: @slt_mul_nsw_neg_3_known_negative(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], -3
+; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
+; CHECK-NEXT:    [[C_2:%.*]] = icmp slt i8 [[START]], 0
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK:       then:
+; CHECK-NEXT:    [[T_0:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_0]])
+; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], -1
+; CHECK-NEXT:    [[T_1:%.*]] = icmp slt i8 [[START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_1]])
+; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], -2
+; CHECK-NEXT:    [[T_2:%.*]] = icmp slt i8 [[START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_2]])
+; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], -3
+; CHECK-NEXT:    [[T_3:%.*]] = icmp slt i8 [[START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_3]])
+; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], -4
+; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_3]])
+; CHECK-NEXT:    ret void
+; CHECK:       else:
+; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_4]])
+; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], -1
+; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_5]])
+; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], -2
+; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_6]])
+; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], -3
+; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_7]])
+; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], -4
+; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_8]])
+; CHECK-NEXT:    ret void
+;
+entry:
+  %mul.3  = mul nsw i8 %start, -3
+  %c.1 = icmp slt i8 %mul.3, %high
+  %c.2 = icmp slt i8 %start, 0
+  %and = and i1 %c.1, %c.2
+  br i1 %and, label %then, label %else
+
+then:
+  %t.0 = icmp slt i8 %start, %high
+  call void @use(i1 %t.0)
+  %start.1 = mul nsw i8 %start, -1
+  %t.1 = icmp slt i8 %start.1, %high
+  call void @use(i1 %t.1)
+  %start.2 = mul nsw i8 %start, -2
+  %t.2 = icmp slt i8 %start.2, %high
+  call void @use(i1 %t.2)
+  %start.3 = mul nsw i8 %start, -3
+  %t.3 = icmp slt i8 %start.3, %high
+  call void @use(i1 %t.3)
+  %start.4 = mul nsw i8 %start, -4
+  %c.3 = icmp slt i8 %start.4, %high
+  call void @use(i1 %c.3)
+  ret void
+
+else:
+  %c.4 = icmp slt i8 %start, %high
+  call void @use(i1 %c.4)
+  %else.start.1 = mul nsw i8 %start, -1
+  %c.5 = icmp slt i8 %else.start.1, %high
+  call void @use(i1 %c.5)
+  %else.start.2 = mul nsw i8 %start, -2
+  %c.6 = icmp slt i8 %else.start.2, %high
+  call void @use(i1 %c.6)
+  %else.start.3 = mul nsw i8 %start, -3
+  %c.7 = icmp slt i8 %else.start.3, %high
+  call void @use(i1 %c.7)
+  %else.start.4 = mul nsw i8 %start, -4
+  %c.8 = icmp slt i8 %else.start.4, %high
+  call void @use(i1 %c.8)
+  ret void
+}
+
+define void @slt_mul_nsw_3_known_negative(i8 %start, i8 %high) {
+; CHECK-LABEL: @slt_mul_nsw_3_known_negative(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], 3
+; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
+; CHECK-NEXT:    [[C_2:%.*]] = icmp slt i8 [[START]], 0
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK:       then:
+; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_3]])
+; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], 1
+; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_4]])
+; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], 2
+; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_5]])
+; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], 3
+; CHECK-NEXT:    [[T_0:%.*]] = icmp slt i8 [[START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_0]])
+; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], 4
+; CHECK-NEXT:    [[T_1:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_1]])
+; CHECK-NEXT:    ret void
+; CHECK:       else:
+; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_6]])
+; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], 1
+; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_7]])
+; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], 2
+; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_8]])
+; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], 3
+; CHECK-NEXT:    [[C_9:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_9]])
+; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], 4
+; CHECK-NEXT:    [[C_10:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_10]])
+; CHECK-NEXT:    ret void
+;
+entry:
+  %mul.3  = mul nsw i8 %start, 3
+  %c.1 = icmp slt i8 %mul.3, %high
+  %c.2 = icmp slt i8 %start, 0
+  %and = and i1 %c.1, %c.2
+  br i1 %and, label %then, label %else
+
+then:
+  %c.3 = icmp slt i8 %start, %high
+  call void @use(i1 %c.3)
+  %start.1 = mul nsw i8 %start, 1
+  %c.4 = icmp slt i8 %start.1, %high
+  call void @use(i1 %c.4)
+  %start.2 = mul nsw i8 %start, 2
+  %c.5 = icmp slt i8 %start.2, %high
+  call void @use(i1 %c.5)
+  %start.3 = mul nsw i8 %start, 3
+  %t.0 = icmp slt i8 %start.3, %high
+  call void @use(i1 %t.0)
+  %start.4 = mul nsw i8 %start, 4
+  %t.1 = icmp slt i8 %start.4, %high
+  call void @use(i1 %t.1)
+  ret void
+
+else:
+  %c.6 = icmp slt i8 %start, %high
+  call void @use(i1 %c.6)
+  %else.start.1 = mul nsw i8 %start, 1
+  %c.7 = icmp slt i8 %else.start.1, %high
+  call void @use(i1 %c.7)
+  %else.start.2 = mul nsw i8 %start, 2
+  %c.8 = icmp slt i8 %else.start.2, %high
+  call void @use(i1 %c.8)
+  %else.start.3 = mul nsw i8 %start, 3
+  %c.9 = icmp slt i8 %else.start.3, %high
+  call void @use(i1 %c.9)
+  %else.start.4 = mul nsw i8 %start, 4
+  %c.10 = icmp slt i8 %else.start.4, %high
+  call void @use(i1 %c.10)
+  ret void
+}
+
+define void @slt_mul_nsw_neg_3_known_positive(i8 %start, i8 %high) {
+; CHECK-LABEL: @slt_mul_nsw_neg_3_known_positive(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], -3
+; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
+; CHECK-NEXT:    [[C_2:%.*]] = icmp sgt i8 [[START]], 0
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK:       then:
+; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_3]])
+; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], -1
+; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_4]])
+; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], -2
+; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_5]])
+; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], -3
+; CHECK-NEXT:    [[T_0:%.*]] = icmp slt i8 [[START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_0]])
+; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], -4
+; CHECK-NEXT:    [[T_1:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_1]])
+; CHECK-NEXT:    ret void
+; CHECK:       else:
+; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_6]])
+; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], -1
+; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_7]])
+; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], -2
+; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_8]])
+; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], -3
+; CHECK-NEXT:    [[C_9:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_9]])
+; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], -4
+; CHECK-NEXT:    [[C_10:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_10]])
+; CHECK-NEXT:    ret void
+;
+entry:
+  %mul.3  = mul nsw i8 %start, -3
+  %c.1 = icmp slt i8 %mul.3, %high
+  %c.2 = icmp sgt i8 %start, 0
+  %and = and i1 %c.1, %c.2
+  br i1 %and, label %then, label %else
+
+then:
+  %c.3 = icmp slt i8 %start, %high
+  call void @use(i1 %c.3)
+  %start.1 = mul nsw i8 %start, -1
+  %c.4 = icmp slt i8 %start.1, %high
+  call void @use(i1 %c.4)
+  %start.2 = mul nsw i8 %start, -2
+  %c.5 = icmp slt i8 %start.2, %high
+  call void @use(i1 %c.5)
+  %start.3 = mul nsw i8 %start, -3
+  %t.0 = icmp slt i8 %start.3, %high
+  call void @use(i1 %t.0)
+  %start.4 = mul nsw i8 %start, -4
+  %t.1 = icmp slt i8 %start.4, %high
+  call void @use(i1 %t.1)
+  ret void
+
+else:
+  %c.6 = icmp slt i8 %start, %high
+  call void @use(i1 %c.6)
+  %else.start.1 = mul nsw i8 %start, -1
+  %c.7 = icmp slt i8 %else.start.1, %high
+  call void @use(i1 %c.7)
+  %else.start.2 = mul nsw i8 %start, -2
+  %c.8 = icmp slt i8 %else.start.2, %high
+  call void @use(i1 %c.8)
+  %else.start.3 = mul nsw i8 %start, -3
+  %c.9 = icmp slt i8 %else.start.3, %high
+  call void @use(i1 %c.9)
+  %else.start.4 = mul nsw i8 %start, -4
+  %c.10 = icmp slt i8 %else.start.4, %high
+  call void @use(i1 %c.10)
+  ret void
+}
+
+define void @slt_mul_nsw_3_known_nonnegative(i8 %start, i8 %high) {
+; CHECK-LABEL: @slt_mul_nsw_3_known_nonnegative(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], 3
+; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
+; CHECK-NEXT:    [[C_2:%.*]] = icmp sge i8 [[START]], 0
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK:       then:
+; CHECK-NEXT:    [[T_0:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_0]])
+; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], 1
+; CHECK-NEXT:    [[T_1:%.*]] = icmp slt i8 [[START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_1]])
+; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], 2
+; CHECK-NEXT:    [[T_2:%.*]] = icmp slt i8 [[START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_2]])
+; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], 3
+; CHECK-NEXT:    [[T_3:%.*]] = icmp slt i8 [[START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_3]])
+; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], 4
+; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_3]])
+; CHECK-NEXT:    ret void
+; CHECK:       else:
+; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_4]])
+; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], 1
+; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_5]])
+; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], 2
+; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_6]])
+; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], 3
+; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_7]])
+; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], 4
+; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_8]])
+; CHECK-NEXT:    ret void
+;
+entry:
+  %mul.3  = mul nsw i8 %start, 3
+  %c.1 = icmp slt i8 %mul.3, %high
+  %c.2 = icmp sge i8 %start, 0
+  %and = and i1 %c.1, %c.2
+  br i1 %and, label %then, label %else
+
+then:
+  %t.0 = icmp slt i8 %start, %high
+  call void @use(i1 %t.0)
+  %start.1 = mul nsw i8 %start, 1
+  %t.1 = icmp slt i8 %start.1, %high
+  call void @use(i1 %t.1)
+  %start.2 = mul nsw i8 %start, 2
+  %t.2 = icmp slt i8 %start.2, %high
+  call void @use(i1 %t.2)
+  %start.3 = mul nsw i8 %start, 3
+  %t.3 = icmp slt i8 %start.3, %high
+  call void @use(i1 %t.3)
+  %start.4 = mul nsw i8 %start, 4
+  %c.3 = icmp slt i8 %start.4, %high
+  call void @use(i1 %c.3)
+  ret void
+
+else:
+  %c.4 = icmp slt i8 %start, %high
+  call void @use(i1 %c.4)
+  %else.start.1 = mul nsw i8 %start, 1
+  %c.5 = icmp slt i8 %else.start.1, %high
+  call void @use(i1 %c.5)
+  %else.start.2 = mul nsw i8 %start, 2
+  %c.6 = icmp slt i8 %else.start.2, %high
+  call void @use(i1 %c.6)
+  %else.start.3 = mul nsw i8 %start, 3
+  %c.7 = icmp slt i8 %else.start.3, %high
+  call void @use(i1 %c.7)
+  %else.start.4 = mul nsw i8 %start, 4
+  %c.8 = icmp slt i8 %else.start.4, %high
+  call void @use(i1 %c.8)
+  ret void
+}
+
+define void @slt_mul_nsw_both_var_non_negative(i8 %start, i8 %scale, i8 %high) {
+; CHECK-LABEL: @slt_mul_nsw_both_var_non_negative(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], [[SCALE:%.*]]
+; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
+; CHECK-NEXT:    [[C_2:%.*]] = icmp sgt i8 [[START]], 0
+; CHECK-NEXT:    [[C3:%.*]] = icmp sgt i8 [[SCALE]], 0
+; CHECK-NEXT:    call void @llvm.assume(i1 [[C3]])
+; CHECK-NEXT:    [[C4:%.*]] = icmp sle i8 [[SCALE]], 3
+; CHECK-NEXT:    call void @llvm.assume(i1 [[C3]])
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK:       then:
+; CHECK-NEXT:    [[T_0:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_0]])
+; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], 1
+; CHECK-NEXT:    [[T_1:%.*]] = icmp slt i8 [[START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_1]])
+; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], 2
+; CHECK-NEXT:    [[T_2:%.*]] = icmp slt i8 [[START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_2]])
+; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], 3
+; CHECK-NEXT:    [[T_3:%.*]] = icmp slt i8 [[START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_3]])
+; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], 4
+; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_3]])
+; CHECK-NEXT:    ret void
+; CHECK:       else:
+; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_4]])
+; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], 1
+; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_5]])
+; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], 2
+; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_6]])
+; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], 3
+; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_7]])
+; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], 4
+; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_8]])
+; CHECK-NEXT:    ret void
+;
+entry:
+  %mul.3  = mul nsw i8 %start, %scale
+  %c.1 = icmp slt i8 %mul.3, %high
+  %c.2 = icmp sgt i8 %start, 0
+  %c3 = icmp sgt i8 %scale, 0
+  call void @llvm.assume(i1 %c3)
+  %c4 = icmp sle i8 %scale, 3
+  call void @llvm.assume(i1 %c3)
+  %and = and i1 %c.1, %c.2
+  br i1 %and, label %then, label %else
+
+then:
+  %t.0 = icmp slt i8 %start, %high
+  call void @use(i1 %t.0)
+  %start.1 = mul nsw i8 %start, 1
+  %t.1 = icmp slt i8 %start.1, %high
+  call void @use(i1 %t.1)
+  %start.2 = mul nsw i8 %start, 2
+  %t.2 = icmp slt i8 %start.2, %high
+  call void @use(i1 %t.2)
+  %start.3 = mul nsw i8 %start, 3
+  %t.3 = icmp slt i8 %start.3, %high
+  call void @use(i1 %t.3)
+  %start.4 = mul nsw i8 %start, 4
+  %c.3 = icmp slt i8 %start.4, %high
+  call void @use(i1 %c.3)
+  ret void
+
+else:
+  %c.4 = icmp slt i8 %start, %high
+  call void @use(i1 %c.4)
+  %else.start.1 = mul nsw i8 %start, 1
+  %c.5 = icmp slt i8 %else.start.1, %high
+  call void @use(i1 %c.5)
+  %else.start.2 = mul nsw i8 %start, 2
+  %c.6 = icmp slt i8 %else.start.2, %high
+  call void @use(i1 %c.6)
+  %else.start.3 = mul nsw i8 %start, 3
+  %c.7 = icmp slt i8 %else.start.3, %high
+  call void @use(i1 %c.7)
+  %else.start.4 = mul nsw i8 %start, 4
+  %c.8 = icmp slt i8 %else.start.4, %high
+  call void @use(i1 %c.8)
+  ret void
+}
+
+define void @ult_mul_nsw_3_known_positive(i8 %start, i8 %high) {
+; CHECK-LABEL: @ult_mul_nsw_3_known_positive(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], 3
+; CHECK-NEXT:    [[C_1:%.*]] = icmp ult i8 [[MUL_3]], [[HIGH:%.*]]
+; CHECK-NEXT:    [[C_2:%.*]] = icmp ugt i8 [[START]], 0
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK:       then:
+; CHECK-NEXT:    [[T_0:%.*]] = icmp ult i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_0]])
+; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], 1
+; CHECK-NEXT:    [[T_1:%.*]] = icmp ult i8 [[START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_1]])
+; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], 2
+; CHECK-NEXT:    [[T_2:%.*]] = icmp ult i8 [[START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_2]])
+; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], 3
+; CHECK-NEXT:    [[T_3:%.*]] = icmp ult i8 [[START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[T_3]])
+; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], 4
+; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_3]])
+; CHECK-NEXT:    ret void
+; CHECK:       else:
+; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_4]])
+; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], 1
+; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_5]])
+; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], 2
+; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_6]])
+; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], 3
+; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_7]])
+; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], 4
+; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
+; CHECK-NEXT:    call void @use(i1 [[C_8]])
+; CHECK-NEXT:    ret void
+;
+entry:
+  %mul.3  = mul nsw i8 %start, 3
+  %c.1 = icmp ult i8 %mul.3, %high
+  %c.2 = icmp ugt i8 %start, 0
+  %and = and i1 %c.1, %c.2
+  br i1 %and, label %then, label %else
+
+then:
+  %t.0 = icmp ult i8 %start, %high
+  call void @use(i1 %t.0)
+  %start.1 = mul nsw i8 %start, 1
+  %t.1 = icmp ult i8 %start.1, %high
+  call void @use(i1 %t.1)
+  %start.2 = mul nsw i8 %start, 2
+  %t.2 = icmp ult i8 %start.2, %high
+  call void @use(i1 %t.2)
+  %start.3 = mul nsw i8 %start, 3
+  %t.3 = icmp ult i8 %start.3, %high
+  call void @use(i1 %t.3)
+  %start.4 = mul nsw i8 %start, 4
+  %c.3 = icmp slt i8 %start.4, %high
+  call void @use(i1 %c.3)
+  ret void
+
+else:
+  %c.4 = icmp slt i8 %start, %high
+  call void @use(i1 %c.4)
+  %else.start.1 = mul nsw i8 %start, 1
+  %c.5 = icmp slt i8 %else.start.1, %high
+  call void @use(i1 %c.5)
+  %else.start.2 = mul nsw i8 %start, 2
+  %c.6 = icmp slt i8 %else.start.2, %high
+  call void @use(i1 %c.6)
+  %else.start.3 = mul nsw i8 %start, 3
+  %c.7 = icmp slt i8 %else.start.3, %high
+  call void @use(i1 %c.7)
+  %else.start.4 = mul nsw i8 %start, 4
+  %c.8 = icmp slt i8 %else.start.4, %high
+  call void @use(i1 %c.8)
+  ret void
+}
+
+