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245f9d6493
ConstantFolding crashes when trying to InstSimplify the following load:
@a = private unnamed_addr constant %mst {
i8* inttoptr (i64 -1 to i8*),
i8* inttoptr (i64 -1 to i8*)
}, align 8
%x = load <2 x i8*>* bitcast (%mst* @a to <2 x i8*>*), align 8
This patch fix this by adding support to this type of folding:
%x = load <2 x i8*>* bitcast (%mst* @a to <2 x i8*>*), align 8
==> gets folded to:
%x = <2 x i8*> <i8* inttoptr (i64 -1 to i8*), i8* inttoptr (i64 -1 to i8*)>
llvm-svn: 220380
36 lines
1.2 KiB
LLVM
36 lines
1.2 KiB
LLVM
; RUN: opt -S -instsimplify < %s | FileCheck %s
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target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128"
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%mst = type { i8*, i8* }
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%mst2 = type { i32*, i32*, i32*, i32* }
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@a = private unnamed_addr constant %mst { i8* inttoptr (i64 -1 to i8*),
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i8* inttoptr (i64 -1 to i8*)},
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align 8
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@b = private unnamed_addr constant %mst2 { i32* inttoptr (i64 42 to i32*),
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i32* inttoptr (i64 67 to i32*),
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i32* inttoptr (i64 33 to i32*),
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i32* inttoptr (i64 58 to i32*)},
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align 8
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define i64 @fn() {
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%x = load <2 x i8*>* bitcast (%mst* @a to <2 x i8*>*), align 8
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%b = extractelement <2 x i8*> %x, i32 0
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%c = ptrtoint i8* %b to i64
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; CHECK-LABEL: @fn
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; CHECK-NEXT: ret i64 -1
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ret i64 %c
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}
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define i64 @fn2() {
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%x = load <4 x i32*>* bitcast (%mst2* @b to <4 x i32*>*), align 8
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%b = extractelement <4 x i32*> %x, i32 0
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%c = extractelement <4 x i32*> %x, i32 3
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%d = ptrtoint i32* %b to i64
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%e = ptrtoint i32* %c to i64
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%r = add i64 %d, %e
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; CHECK-LABEL: @fn2
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; CHECK-NEXT: ret i64 100
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ret i64 %r
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}
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