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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2 | ||
; RUN: opt -S -passes=gvn < %s | FileCheck %s | ||
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; FIXME: This is a miscompile. | ||
define i8 @test(i1 %c, i64 %offset, ptr %ptr) { | ||
; CHECK-LABEL: define i8 @test | ||
; CHECK-SAME: (i1 [[C:%.*]], i64 [[OFFSET:%.*]], ptr [[PTR:%.*]]) { | ||
; CHECK-NEXT: start: | ||
; CHECK-NEXT: [[ALLOCA:%.*]] = alloca [8 x i8], align 8 | ||
; CHECK-NEXT: store i64 1234605616436508552, ptr [[ALLOCA]], align 8 | ||
; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr i8, ptr [[ALLOCA]], i64 2 | ||
; CHECK-NEXT: [[GEP_UNKNOWN:%.*]] = getelementptr i8, ptr [[ALLOCA]], i64 [[OFFSET]] | ||
; CHECK-NEXT: br i1 [[C]], label [[JOIN:%.*]], label [[IF:%.*]] | ||
; CHECK: if: | ||
; CHECK-NEXT: br label [[JOIN]] | ||
; CHECK: join: | ||
; CHECK-NEXT: [[PHI:%.*]] = phi ptr [ [[GEP_UNKNOWN]], [[START:%.*]] ], [ [[GEP_2]], [[IF]] ] | ||
; CHECK-NEXT: store i8 0, ptr [[ALLOCA]], align 8 | ||
; CHECK-NEXT: [[LOAD1:%.*]] = load i64, ptr [[ALLOCA]], align 8 | ||
; CHECK-NEXT: store i64 [[LOAD1]], ptr [[PTR]], align 8 | ||
; CHECK-NEXT: [[TMP0:%.*]] = lshr i64 [[LOAD1]], 16 | ||
; CHECK-NEXT: [[TMP1:%.*]] = trunc i64 [[TMP0]] to i8 | ||
; CHECK-NEXT: ret i8 [[TMP1]] | ||
; | ||
start: | ||
%alloca = alloca [8 x i8], align 8 | ||
store i64 u0x1122334455667788, ptr %alloca, align 8 | ||
%gep.2 = getelementptr i8, ptr %alloca, i64 2 | ||
%gep.unknown = getelementptr i8, ptr %alloca, i64 %offset | ||
br i1 %c, label %join, label %if | ||
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if: | ||
br label %join | ||
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join: | ||
%phi = phi ptr [ %gep.unknown, %start ], [ %gep.2, %if ] | ||
store i8 0, ptr %alloca, align 8 | ||
%load1 = load i64, ptr %alloca, align 8 | ||
store i64 %load1, ptr %ptr, align 8 | ||
%load2 = load i8, ptr %phi, align 1 | ||
ret i8 %load2 | ||
} |