7e25b24073
Not sure why the "fold-all" option naming didn't match the variable "FoldPreOutputs", but I've preserved the difference. More annoyingly, the pass name "normalize" does not match the pass name IRNormalizer and should probably be fixed one way or the other. Also the existing test coverage for the flags is lacking. I've added a test that shows they parse, but we should have tests that they do something.
164 lines
4.4 KiB
LLVM
164 lines
4.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt -S -passes='normalize<no-rename-all>' -verify-each < %s | FileCheck %s
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define void @foo() {
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; CHECK-LABEL: define void @foo() {
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; CHECK-NEXT: bb17254:
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; CHECK-NEXT: ret void
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;
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ret void
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}
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define void @empty_basic_block() {
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; CHECK-LABEL: define void @empty_basic_block() {
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; CHECK-NEXT: exit:
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; CHECK-NEXT: ret void
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;
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exit:
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ret void
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}
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declare void @effecting()
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; Place dead instruction(s) before the terminator
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define void @call_effecting() {
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; CHECK-LABEL: define void @call_effecting() {
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; CHECK-NEXT: bb15160:
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; CHECK-NEXT: call void @effecting()
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; CHECK-NEXT: [[TMP0:%.*]] = add i32 0, 1
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; CHECK-NEXT: ret void
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;
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%1 = add i32 0, 1
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call void @effecting()
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ret void
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}
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define void @dont_move_above_phi() {
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; CHECK-LABEL: define void @dont_move_above_phi() {
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; CHECK-NEXT: bb76951:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: [[TMP0:%.*]] = phi i32 [ 0, [[BB76951:%.*]] ]
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; CHECK-NEXT: call void @effecting()
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; CHECK-NEXT: ret void
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;
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br label %exit
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exit:
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%1 = phi i32 [0, %0]
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call void @effecting()
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ret void
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}
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define void @dont_move_above_alloca() {
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; CHECK-LABEL: define void @dont_move_above_alloca() {
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; CHECK-NEXT: bb15160:
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; CHECK-NEXT: [[TMP0:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @effecting()
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; CHECK-NEXT: ret void
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;
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%1 = alloca i32
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call void @effecting()
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ret void
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}
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declare void @effecting1()
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define void @dont_reorder_effecting() {
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; CHECK-LABEL: define void @dont_reorder_effecting() {
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; CHECK-NEXT: bb10075:
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; CHECK-NEXT: call void @effecting()
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; CHECK-NEXT: call void @effecting1()
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; CHECK-NEXT: ret void
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;
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call void @effecting()
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call void @effecting1()
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ret void
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}
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declare void @effecting2(i32)
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define void @dont_reorder_effecting1() {
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; CHECK-LABEL: define void @dont_reorder_effecting1() {
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; CHECK-NEXT: bb10075:
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; CHECK-NEXT: [[ONE:%.*]] = add i32 1, 1
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; CHECK-NEXT: call void @effecting2(i32 [[ONE]])
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; CHECK-NEXT: [[TWO:%.*]] = add i32 2, 2
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; CHECK-NEXT: call void @effecting2(i32 [[TWO]])
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; CHECK-NEXT: ret void
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;
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%one = add i32 1, 1
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%two = add i32 2, 2
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call void @effecting2(i32 %one)
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call void @effecting2(i32 %two)
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ret void
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}
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define void @dont_reorder_across_blocks() {
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; CHECK-LABEL: define void @dont_reorder_across_blocks() {
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; CHECK-NEXT: bb76951:
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; CHECK-NEXT: [[ONE:%.*]] = add i32 1, 1
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: call void @effecting2(i32 [[ONE]])
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; CHECK-NEXT: ret void
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;
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%one = add i32 1, 1
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br label %exit
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exit:
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call void @effecting2(i32 %one)
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ret void
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}
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define void @independentldst(ptr %a, ptr %b) {
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; CHECK-LABEL: define void @independentldst(
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; CHECK-SAME: ptr [[A:%.*]], ptr [[B:%.*]]) {
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; CHECK-NEXT: bb10495:
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; CHECK-NEXT: %"vl12961([[B]])" = load i32, ptr [[B]], align 4
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; CHECK-NEXT: store i32 %"vl12961([[B]])", ptr [[A]], align 4
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; CHECK-NEXT: %"vl89528([[A]])" = load i32, ptr [[A]], align 4
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; CHECK-NEXT: store i32 %"vl89528([[A]])", ptr [[B]], align 4
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; CHECK-NEXT: ret void
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;
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%2 = load i32, ptr %a
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%3 = load i32, ptr %b
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store i32 %3, ptr %a
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store i32 %2, ptr %b
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ret void
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}
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define void @multiple_use_ld(ptr %a, ptr %b) {
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; CHECK-LABEL: define void @multiple_use_ld(
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; CHECK-SAME: ptr [[A:%.*]], ptr [[B:%.*]]) {
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; CHECK-NEXT: bb14927:
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; CHECK-NEXT: %"vl16793([[A]])" = load i32, ptr [[A]], align 4
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; CHECK-NEXT: store i32 %"vl16793([[A]])", ptr [[A]], align 4
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; CHECK-NEXT: %"vl89528([[B]])" = load i32, ptr [[B]], align 4
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; CHECK-NEXT: store i32 %"vl89528([[B]])", ptr [[B]], align 4
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; CHECK-NEXT: store i32 %"vl16793([[A]])", ptr [[A]], align 4
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; CHECK-NEXT: ret void
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;
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%2 = load i32, ptr %a
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store i32 %2, ptr %a
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%3 = load i32, ptr %b
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store i32 %3, ptr %b
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store i32 %2, ptr %a
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ret void
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}
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; This is an incorrect transformation. Moving the store above the load could
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; change the loaded value. To do this, the pointers would need to be `noalias`.
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define void @undef_st(ptr %a, ptr %b) {
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; CHECK-LABEL: define void @undef_st(
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; CHECK-SAME: ptr [[A:%.*]], ptr [[B:%.*]]) {
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; CHECK-NEXT: bb10495:
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; CHECK-NEXT: store i32 undef, ptr [[B]], align 4
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; CHECK-NEXT: %"vl16028([[A]])" = load i32, ptr [[A]], align 4
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; CHECK-NEXT: store i32 %"vl16028([[A]])", ptr [[A]], align 4
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; CHECK-NEXT: ret void
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;
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%2 = load i32, ptr %a
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store i32 undef, ptr %b
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store i32 %2, ptr %a
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ret void
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}
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