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| author | Jozef Lawrynowicz <jozef.l@mittosystems.com> | 2020-04-10 17:31:33 +0100 |
|---|---|---|
| committer | Jozef Lawrynowicz <jozef.l@mittosystems.com> | 2020-04-13 10:50:40 +0100 |
| commit | 04637536a6b69c6bf7e22e2ccd5ff3bfc4892394 (patch) | |
| tree | 7cccde9fc3452b99865598bc070c163b366bd717 | |
| parent | 14f27ee6c97c585018882ac8f1f5f2d64618ba66 (diff) | |
| download | gcc-04637536a6b69c6bf7e22e2ccd5ff3bfc4892394.zip gcc-04637536a6b69c6bf7e22e2ccd5ff3bfc4892394.tar.gz gcc-04637536a6b69c6bf7e22e2ccd5ff3bfc4892394.tar.bz2 | |
MSP430: Dont add offsets to addresses when emitting asm for post_inc
Some insns, which operate on SImode operands, output assembler template
that comprise of multiple instructions using HImode operands. To access
the high word of an SImode operand, an operand selector '%H' is used to
offset the operand value by a constant amount.
When one of these HImode operands is a memory reference to a post_inc,
the address does not need to be offset, since the preceding instruction
has already offset the address to the correct value.
This fixes an ICE in change_address_1, at emit-rtl.c:2318 for
gcc.c-torture/execute/pr20527-1.c in the "-mlarge -O2 -flto
-fuse-linker-plugin -fno-fat-lto-objects" configuration.
This test generated the following insn, and the attempt to output the
high part of the post_inc address caused the ICE.
(set (reg:SI 6 R6)
(minus:SI (reg:SI 6 R6)
(mem:SI (post_inc:PSI (reg:PSI 10 R10)) {subsi3}
gcc/ChangeLog:
2020-04-13 Jozef Lawrynowicz <jozef.l@mittosystems.com>
* config/msp430/msp430.c (msp430_print_operand): Don't add offsets to
memory references in %B, %C and %D operand selectors when the inner
operand is a post increment address.
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/msp430/msp430.c | 10 |
2 files changed, 13 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c0ac32d..8bfc212 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2020-04-13 Jozef Lawrynowicz <jozef.l@mittosystems.com> + * config/msp430/msp430.c (msp430_print_operand): Don't add offsets to + memory references in %B, %C and %D operand selectors when the inner + operand is a post increment address. + +2020-04-13 Jozef Lawrynowicz <jozef.l@mittosystems.com> + * config/msp430/msp430.c (msp430_print_operand): Offset a %C memory reference by 4 bytes, and %D memory reference by 6 bytes. diff --git a/gcc/config/msp430/msp430.c b/gcc/config/msp430/msp430.c index 9653274..e77ca10 100644 --- a/gcc/config/msp430/msp430.c +++ b/gcc/config/msp430/msp430.c @@ -3474,7 +3474,9 @@ msp430_print_operand (FILE * file, rtx op, int letter) switch (GET_CODE (op)) { case MEM: - op = adjust_address (op, Pmode, 2); + /* We don't need to adjust the address for post_inc. */ + op = adjust_address (op, Pmode, + (GET_CODE (XEXP (op, 0)) == POST_INC) ? 0 : 2); break; case REG: op = gen_rtx_REG (Pmode, REGNO (op) + 1); @@ -3492,7 +3494,8 @@ msp430_print_operand (FILE * file, rtx op, int letter) switch (GET_CODE (op)) { case MEM: - op = adjust_address (op, Pmode, 4); + op = adjust_address (op, Pmode, + (GET_CODE (XEXP (op, 0)) == POST_INC) ? 0 : 4); break; case REG: op = gen_rtx_REG (Pmode, REGNO (op) + 2); @@ -3510,7 +3513,8 @@ msp430_print_operand (FILE * file, rtx op, int letter) switch (GET_CODE (op)) { case MEM: - op = adjust_address (op, Pmode, 6); + op = adjust_address (op, Pmode, + (GET_CODE (XEXP (op, 0)) == POST_INC) ? 0 : 6); break; case REG: op = gen_rtx_REG (Pmode, REGNO (op) + 3); |