42 lines
1.4 KiB
LLVM
42 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=s390x-linux-gnu -pre-RA-sched=list-ilp -disable-sched-live-uses=false | FileCheck %s
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target datalayout = "E-m:e-i1:8:16-i8:8:16-i64:64-f128:64-v128:64-a:8:16-n32:64"
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%struct.a = type { i16, i32 }
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@e = dso_local global %struct.a { i16 9, i32 0 }, align 8
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@f = dso_local local_unnamed_addr global ptr @e, align 8
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@d = dso_local local_unnamed_addr global i32 0, align 4
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; This shows a miscompile caused by merging truncated
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; stores if the store of 0 (sthrl) to 'e' happens before
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; a 64-bit store (stg) of r0. The store of r0 can follow
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; the store to 'e' only if it is a 32-bit store (st).
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define signext i32 @main() {
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; CHECK-LABEL: main:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lgrl %r0, e
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; CHECK-NEXT: lgrl %r1, f
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; CHECK-NEXT: srlg %r2, %r0, 32
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; CHECK-NEXT: st %r2, 0(%r1)
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; CHECK-NEXT: lhi %r2, 0
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; CHECK-NEXT: sthrl %r2, e
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; CHECK-NEXT: st %r0, 4(%r1)
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; CHECK-NEXT: lghi %r2, 0
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; CHECK-NEXT: strl %r0, d
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; CHECK-NEXT: br %r14
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%e = load i64, ptr @e, align 8
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%esh = lshr i64 %e, 32
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%ehi = trunc i64 %esh to i32
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%elo = trunc i64 %e to i32
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%t1 = load ptr, ptr @f, align 8
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store i32 %ehi, ptr %t1, align 4
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%f4 = getelementptr inbounds i8, ptr %t1, i64 4
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store i32 %elo, ptr %f4, align 4
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store i16 0, ptr @e, align 8
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store i32 %elo, ptr @d, align 4
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ret i32 0
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}
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