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TheRock/compiler/amd-llvm/llvm/test/Transforms/LoopFusion/sink_load.ll
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derek.holloway 7502bf64a4
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

49 lines
1.6 KiB
LLVM

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=loop-simplify,loop-fusion -debug-only=loop-fusion < %s 2>&1 | FileCheck %s
; REQUIRES: asserts
; CHECK: Safe to sink.
@A = common global [100 x i32] zeroinitializer, align 16
define void @sink_preheader(i32 %N) {
; CHECK-LABEL: @sink_preheader(
; CHECK-NEXT: pre1:
; CHECK-NEXT: [[PTR:%.*]] = alloca i32, align 4
; CHECK-NEXT: br label [[BODY1:%.*]]
; CHECK: body1:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[BODY1]] ], [ 0, [[PRE1:%.*]] ]
; CHECK-NEXT: [[I2:%.*]] = phi i32 [ [[I_NEXT2:%.*]], [[BODY1]] ], [ 0, [[PRE1]] ]
; CHECK-NEXT: [[I_NEXT]] = add i32 1, [[I]]
; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[I]], [[N:%.*]]
; CHECK-NEXT: store i32 3, ptr [[PTR]], align 4
; CHECK-NEXT: [[I_NEXT2]] = add i32 1, [[I2]]
; CHECK-NEXT: [[COND2:%.*]] = icmp ne i32 [[I2]], [[N]]
; CHECK-NEXT: br i1 [[COND2]], label [[BODY1]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: [[B:%.*]] = load i32, ptr [[PTR]], align 4
; CHECK-NEXT: ret void
;
pre1:
%ptr = alloca i32
br label %body1
body1: ; preds = %pre1, %body1
%i = phi i32 [%i_next, %body1], [0, %pre1]
%i_next = add i32 1, %i
%cond = icmp ne i32 %i, %N
store i32 3, ptr %ptr
br i1 %cond, label %body1, label %pre2
pre2:
%b = load i32, ptr %ptr
br label %body2
body2: ; preds = %pre2, %body2
%i2 = phi i32 [%i_next2, %body2], [0, %pre2]
%i_next2 = add i32 1, %i2
%cond2 = icmp ne i32 %i2, %N
br i1 %cond2, label %body2, label %exit
exit:
ret void
}