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58ab63e179
transformation much more careful. Truncating binary '01' to '1' sounds like it's safe until you realize that it switched from positive to negative under a signed interpretation, and that depends on the icmp predicate. Also a few miscellaneous cleanups. llvm-svn: 97721
19 lines
824 B
LLVM
19 lines
824 B
LLVM
; RUN: opt -instcombine -S %s | FileCheck %s
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; PR6486
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"
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target triple = "i386-unknown-linux-gnu"
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@g_92 = common global [2 x i32*] zeroinitializer, align 4 ; <[2 x i32*]*> [#uses=1]
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@g_177 = constant i32** bitcast (i8* getelementptr (i8* bitcast ([2 x i32*]* @g_92 to i8*), i64 4) to i32**), align 4 ; <i32***> [#uses=1]
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define i1 @test() nounwind {
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; CHECK: @test
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%tmp = load i32*** @g_177 ; <i32**> [#uses=1]
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%cmp = icmp ne i32** null, %tmp ; <i1> [#uses=1]
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%conv = zext i1 %cmp to i32 ; <i32> [#uses=1]
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%cmp1 = icmp sle i32 0, %conv ; <i1> [#uses=1]
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ret i1 %cmp1
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; CHECK: ret i1 true
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}
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