From b9887ef32a5d06108dfabbbe181bd8e4ea7abbfe Mon Sep 17 00:00:00 2001 From: Renato Golin Date: Wed, 25 Feb 2015 14:41:06 +0000 Subject: Improve handling of stack accesses in Thumb-1 Thumb-1 only allows SP-based LDR and STR to be word-sized, and SP-base LDR, STR, and ADD only allow offsets that are a multiple of 4. Make some changes to better make use of these instructions: * Use word loads for anyext byte and halfword loads from the stack. * Enforce 4-byte alignment on objects accessed in this way, to ensure that the offset is valid. * Do the same for objects whose frame index is used, in order to avoid having to use more than one ADD to generate the frame index. * Correct how many bits of offset we think AddrModeT1_s has. Patch by John Brawn. llvm-svn: 230496 --- llvm/test/CodeGen/ARM/debug-frame-vararg.ll | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) (limited to 'llvm/test/CodeGen/ARM/debug-frame-vararg.ll') diff --git a/llvm/test/CodeGen/ARM/debug-frame-vararg.ll b/llvm/test/CodeGen/ARM/debug-frame-vararg.ll index 05521d80646..65be2db6923 100644 --- a/llvm/test/CodeGen/ARM/debug-frame-vararg.ll +++ b/llvm/test/CodeGen/ARM/debug-frame-vararg.ll @@ -88,24 +88,22 @@ ; CHECK-THUMB-FP: .cfi_startproc ; CHECK-THUMB-FP: sub sp, #16 ; CHECK-THUMB-FP: .cfi_def_cfa_offset 16 -; CHECK-THUMB-FP: push {r4, r5, r7, lr} -; CHECK-THUMB-FP: .cfi_def_cfa_offset 32 +; CHECK-THUMB-FP: push {r4, lr} +; CHECK-THUMB-FP: .cfi_def_cfa_offset 24 ; CHECK-THUMB-FP: .cfi_offset lr, -20 -; CHECK-THUMB-FP: .cfi_offset r7, -24 -; CHECK-THUMB-FP: .cfi_offset r5, -28 -; CHECK-THUMB-FP: .cfi_offset r4, -32 +; CHECK-THUMB-FP: .cfi_offset r4, -24 ; CHECK-THUMB-FP: sub sp, #8 -; CHECK-THUMB-FP: .cfi_def_cfa_offset 40 +; CHECK-THUMB-FP: .cfi_def_cfa_offset 32 ; CHECK-THUMB-FP-ELIM-LABEL: sum ; CHECK-THUMB-FP-ELIM: .cfi_startproc ; CHECK-THUMB-FP-ELIM: sub sp, #16 ; CHECK-THUMB-FP-ELIM: .cfi_def_cfa_offset 16 -; CHECK-THUMB-FP-ELIM: push {r4, r5, r7, lr} +; CHECK-THUMB-FP-ELIM: push {r4, r6, r7, lr} ; CHECK-THUMB-FP-ELIM: .cfi_def_cfa_offset 32 ; CHECK-THUMB-FP-ELIM: .cfi_offset lr, -20 ; CHECK-THUMB-FP-ELIM: .cfi_offset r7, -24 -; CHECK-THUMB-FP-ELIM: .cfi_offset r5, -28 +; CHECK-THUMB-FP-ELIM: .cfi_offset r6, -28 ; CHECK-THUMB-FP-ELIM: .cfi_offset r4, -32 ; CHECK-THUMB-FP-ELIM: add r7, sp, #8 ; CHECK-THUMB-FP-ELIM: .cfi_def_cfa r7, 24 -- cgit v1.2.3