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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt -S -passes=normalize -verify-each -norm-rename-all=false < %s | FileCheck %s
define void @foo() {
; CHECK-LABEL: define void @foo() {
; CHECK-NEXT: bb17254:
; CHECK-NEXT: ret void
;
ret void
}
define void @empty_basic_block() {
; CHECK-LABEL: define void @empty_basic_block() {
; CHECK-NEXT: exit:
; CHECK-NEXT: ret void
;
exit:
ret void
}
declare void @effecting()
; Place dead instruction(s) before the terminator
define void @call_effecting() {
; CHECK-LABEL: define void @call_effecting() {
; CHECK-NEXT: bb15160:
; CHECK-NEXT: call void @effecting()
; CHECK-NEXT: [[TMP0:%.*]] = add i32 0, 1
; CHECK-NEXT: ret void
;
%1 = add i32 0, 1
call void @effecting()
ret void
}
define void @dont_move_above_phi() {
; CHECK-LABEL: define void @dont_move_above_phi() {
; CHECK-NEXT: bb76951:
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: [[TMP0:%.*]] = phi i32 [ 0, [[BB76951:%.*]] ]
; CHECK-NEXT: call void @effecting()
; CHECK-NEXT: ret void
;
br label %exit
exit:
%1 = phi i32 [0, %0]
call void @effecting()
ret void
}
define void @dont_move_above_alloca() {
; CHECK-LABEL: define void @dont_move_above_alloca() {
; CHECK-NEXT: bb15160:
; CHECK-NEXT: [[TMP0:%.*]] = alloca i32, align 4
; CHECK-NEXT: call void @effecting()
; CHECK-NEXT: ret void
;
%1 = alloca i32
call void @effecting()
ret void
}
declare void @effecting1()
define void @dont_reorder_effecting() {
; CHECK-LABEL: define void @dont_reorder_effecting() {
; CHECK-NEXT: bb10075:
; CHECK-NEXT: call void @effecting()
; CHECK-NEXT: call void @effecting1()
; CHECK-NEXT: ret void
;
call void @effecting()
call void @effecting1()
ret void
}
declare void @effecting2(i32)
define void @dont_reorder_effecting1() {
; CHECK-LABEL: define void @dont_reorder_effecting1() {
; CHECK-NEXT: bb10075:
; CHECK-NEXT: [[ONE:%.*]] = add i32 1, 1
; CHECK-NEXT: call void @effecting2(i32 [[ONE]])
; CHECK-NEXT: [[TWO:%.*]] = add i32 2, 2
; CHECK-NEXT: call void @effecting2(i32 [[TWO]])
; CHECK-NEXT: ret void
;
%one = add i32 1, 1
%two = add i32 2, 2
call void @effecting2(i32 %one)
call void @effecting2(i32 %two)
ret void
}
define void @dont_reorder_across_blocks() {
; CHECK-LABEL: define void @dont_reorder_across_blocks() {
; CHECK-NEXT: bb76951:
; CHECK-NEXT: [[ONE:%.*]] = add i32 1, 1
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: call void @effecting2(i32 [[ONE]])
; CHECK-NEXT: ret void
;
%one = add i32 1, 1
br label %exit
exit:
call void @effecting2(i32 %one)
ret void
}
define void @independentldst(ptr %a, ptr %b) {
; CHECK-LABEL: define void @independentldst(
; CHECK-SAME: ptr [[A:%.*]], ptr [[B:%.*]]) {
; CHECK-NEXT: bb10495:
; CHECK-NEXT: %"vl12961([[B]])" = load i32, ptr [[B]], align 4
; CHECK-NEXT: store i32 %"vl12961([[B]])", ptr [[A]], align 4
; CHECK-NEXT: %"vl89528([[A]])" = load i32, ptr [[A]], align 4
; CHECK-NEXT: store i32 %"vl89528([[A]])", ptr [[B]], align 4
; CHECK-NEXT: ret void
;
%2 = load i32, ptr %a
%3 = load i32, ptr %b
store i32 %3, ptr %a
store i32 %2, ptr %b
ret void
}
define void @multiple_use_ld(ptr %a, ptr %b) {
; CHECK-LABEL: define void @multiple_use_ld(
; CHECK-SAME: ptr [[A:%.*]], ptr [[B:%.*]]) {
; CHECK-NEXT: bb14927:
; CHECK-NEXT: %"vl16793([[A]])" = load i32, ptr [[A]], align 4
; CHECK-NEXT: store i32 %"vl16793([[A]])", ptr [[A]], align 4
; CHECK-NEXT: %"vl89528([[B]])" = load i32, ptr [[B]], align 4
; CHECK-NEXT: store i32 %"vl89528([[B]])", ptr [[B]], align 4
; CHECK-NEXT: store i32 %"vl16793([[A]])", ptr [[A]], align 4
; CHECK-NEXT: ret void
;
%2 = load i32, ptr %a
store i32 %2, ptr %a
%3 = load i32, ptr %b
store i32 %3, ptr %b
store i32 %2, ptr %a
ret void
}
; This is an incorrect transformation. Moving the store above the load could
; change the loaded value. To do this, the pointers would need to be `noalias`.
define void @undef_st(ptr %a, ptr %b) {
; CHECK-LABEL: define void @undef_st(
; CHECK-SAME: ptr [[A:%.*]], ptr [[B:%.*]]) {
; CHECK-NEXT: bb10495:
; CHECK-NEXT: store i32 undef, ptr [[B]], align 4
; CHECK-NEXT: %"vl16028([[A]])" = load i32, ptr [[A]], align 4
; CHECK-NEXT: store i32 %"vl16028([[A]])", ptr [[A]], align 4
; CHECK-NEXT: ret void
;
%2 = load i32, ptr %a
store i32 undef, ptr %b
store i32 %2, ptr %a
ret void
}
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