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https://github.com/c64scene-ar/llvm-6502.git
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21f83a2f95
generates store to undef and some generates store to null as the idiom for undefined behavior. Since simplifycfg zaps both, don't remove the undefined behavior in instcombine. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89971 91177308-0d34-0410-b5e6-96231b3b80d8
140 lines
4.4 KiB
LLVM
140 lines
4.4 KiB
LLVM
; RUN: opt < %s -instcombine -S
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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-f80:128:128"
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target triple = "i386-apple-darwin10.0"
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define i32 @test0(i8 %tmp2) ssp {
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entry:
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%tmp3 = zext i8 %tmp2 to i32
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%tmp8 = lshr i32 %tmp3, 6
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%tmp9 = lshr i32 %tmp3, 7
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%tmp10 = xor i32 %tmp9, 67108858
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%tmp11 = xor i32 %tmp10, %tmp8
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%tmp12 = xor i32 %tmp11, 0
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ret i32 %tmp12
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}
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; PR4905
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define <2 x i64> @test1(<2 x i64> %x, <2 x i64> %y) nounwind {
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entry:
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%conv.i94 = bitcast <2 x i64> %y to <4 x i32> ; <<4 x i32>> [#uses=1]
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%sub.i97 = sub <4 x i32> %conv.i94, undef ; <<4 x i32>> [#uses=1]
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%conv3.i98 = bitcast <4 x i32> %sub.i97 to <2 x i64> ; <<2 x i64>> [#uses=2]
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%conv2.i86 = bitcast <2 x i64> %conv3.i98 to <4 x i32> ; <<4 x i32>> [#uses=1]
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%cmp.i87 = icmp sgt <4 x i32> undef, %conv2.i86 ; <<4 x i1>> [#uses=1]
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%sext.i88 = sext <4 x i1> %cmp.i87 to <4 x i32> ; <<4 x i32>> [#uses=1]
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%conv3.i89 = bitcast <4 x i32> %sext.i88 to <2 x i64> ; <<2 x i64>> [#uses=1]
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%and.i = and <2 x i64> %conv3.i89, %conv3.i98 ; <<2 x i64>> [#uses=1]
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%or.i = or <2 x i64> zeroinitializer, %and.i ; <<2 x i64>> [#uses=1]
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%conv2.i43 = bitcast <2 x i64> %or.i to <4 x i32> ; <<4 x i32>> [#uses=1]
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%sub.i = sub <4 x i32> zeroinitializer, %conv2.i43 ; <<4 x i32>> [#uses=1]
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%conv3.i44 = bitcast <4 x i32> %sub.i to <2 x i64> ; <<2 x i64>> [#uses=1]
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ret <2 x i64> %conv3.i44
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}
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; PR4908
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define void @test2(<1 x i16>* nocapture %b, i32* nocapture %c) nounwind ssp {
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entry:
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%arrayidx = getelementptr inbounds <1 x i16>* %b, i64 undef ; <<1 x i16>*>
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%tmp2 = load <1 x i16>* %arrayidx ; <<1 x i16>> [#uses=1]
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%tmp6 = bitcast <1 x i16> %tmp2 to i16 ; <i16> [#uses=1]
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%tmp7 = zext i16 %tmp6 to i32 ; <i32> [#uses=1]
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%ins = or i32 0, %tmp7 ; <i32> [#uses=1]
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%arrayidx20 = getelementptr inbounds i32* %c, i64 undef ; <i32*> [#uses=1]
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store i32 %ins, i32* %arrayidx20
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ret void
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}
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; PR5262
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@tmp2 = global i64 0 ; <i64*> [#uses=1]
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declare void @use(i64) nounwind
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define void @foo(i1) nounwind align 2 {
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; <label>:1
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br i1 %0, label %2, label %3
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; <label>:2 ; preds = %1
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br label %3
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; <label>:3 ; preds = %2, %1
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%4 = phi i8 [ 1, %2 ], [ 0, %1 ] ; <i8> [#uses=1]
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%5 = icmp eq i8 %4, 0 ; <i1> [#uses=1]
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%6 = load i64* @tmp2, align 8 ; <i64> [#uses=1]
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%7 = select i1 %5, i64 0, i64 %6 ; <i64> [#uses=1]
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br label %8
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; <label>:8 ; preds = %3
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call void @use(i64 %7)
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ret void
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}
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%t0 = type { i32, i32 }
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%t1 = type { i32, i32, i32, i32, i32* }
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declare %t0* @bar2(i64)
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define void @bar3(i1, i1) nounwind align 2 {
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; <label>:2
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br i1 %1, label %10, label %3
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; <label>:3 ; preds = %2
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%4 = getelementptr inbounds %t0* null, i64 0, i32 1 ; <i32*> [#uses=0]
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%5 = getelementptr inbounds %t1* null, i64 0, i32 4 ; <i32**> [#uses=1]
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%6 = load i32** %5, align 8 ; <i32*> [#uses=1]
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%7 = icmp ne i32* %6, null ; <i1> [#uses=1]
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%8 = zext i1 %7 to i32 ; <i32> [#uses=1]
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%9 = add i32 %8, 0 ; <i32> [#uses=1]
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br label %10
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; <label>:10 ; preds = %3, %2
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%11 = phi i32 [ %9, %3 ], [ 0, %2 ] ; <i32> [#uses=1]
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br i1 %1, label %12, label %13
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; <label>:12 ; preds = %10
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br label %13
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; <label>:13 ; preds = %12, %10
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%14 = zext i32 %11 to i64 ; <i64> [#uses=1]
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%15 = tail call %t0* @bar2(i64 %14) nounwind ; <%0*> [#uses=0]
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ret void
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}
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; PR5262
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; Make sure the PHI node gets put in a place where all of its operands dominate
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; it.
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define i64 @test4(i1 %c, i64* %P) nounwind align 2 {
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BB0:
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br i1 %c, label %BB1, label %BB2
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BB1:
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br label %BB2
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BB2:
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%v5_ = phi i1 [ true, %BB0], [false, %BB1]
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%v6 = load i64* %P
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br label %l8
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l8:
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br label %l10
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l10:
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%v11 = select i1 %v5_, i64 0, i64 %v6
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ret i64 %v11
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}
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; PR5471
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define arm_apcscc i32 @test5a() {
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ret i32 0
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}
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define arm_apcscc void @test5() {
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store i1 true, i1* undef
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%1 = invoke i32 @test5a() to label %exit unwind label %exit
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exit:
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ret void
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}
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