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; Test that a conditional branch with a discoverably trivial condition
; does not result in an invalid conditional branch instruction.
;
; RUN: llc < %s -verify-machineinstrs -mtriple=s390x-linux-gnu -mcpu=z13 \
; RUN: --stop-after=systemz-isel | FileCheck %s
@g_1 = dso_local local_unnamed_addr global i64 0, align 8
@g_2 = dso_local local_unnamed_addr global i32 0, align 4
define dso_local void @f1() local_unnamed_addr #1 {
entry:
;CHECK-LABEL: f1
;CHECK-NOT: BRC 14, 0, %bb.2
%0 = load i64, ptr @g_1, align 8
%tobool.not = icmp eq i64 %0, 0
%sub.i = select i1 %tobool.not, i8 4, i8 3
%conv1 = zext nneg i8 %sub.i to i32
store i32 %conv1, ptr @g_2, align 4
%.pr = load i32, ptr @g_2, align 4
%tobool5.not = icmp eq i32 %.pr, 0
br i1 %tobool5.not, label %for.cond, label %lbl_1
lbl_1:
br label %lbl_1
for.cond:
br label %for.cond
}
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