forked from OSchip/llvm-project
124 lines
2.6 KiB
LLVM
124 lines
2.6 KiB
LLVM
; XFAIL: *
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; RUN: opt < %s -basic-aa -newgvn -S | FileCheck %s
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@a = external global i32 ; <i32*> [#uses=7]
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;; NewGVN takes two passes to get this, because we prune predicateinfo
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; CHECK-LABEL: @test1(
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define i32 @test1() nounwind {
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entry:
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%0 = load i32, i32* @a, align 4
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%1 = icmp eq i32 %0, 4
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br i1 %1, label %bb, label %bb1
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bb: ; preds = %entry
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br label %bb8
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bb1: ; preds = %entry
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%2 = load i32, i32* @a, align 4
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%3 = icmp eq i32 %2, 5
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br i1 %3, label %bb2, label %bb3
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bb2: ; preds = %bb1
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br label %bb8
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bb3: ; preds = %bb1
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%4 = load i32, i32* @a, align 4
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%5 = icmp eq i32 %4, 4
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; CHECK: br i1 false, label %bb4, label %bb5
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br i1 %5, label %bb4, label %bb5
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bb4: ; preds = %bb3
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%6 = load i32, i32* @a, align 4
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%7 = add i32 %6, 5
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br label %bb8
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bb5: ; preds = %bb3
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%8 = load i32, i32* @a, align 4
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%9 = icmp eq i32 %8, 5
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; CHECK: br i1 false, label %bb6, label %bb7
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br i1 %9, label %bb6, label %bb7
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bb6: ; preds = %bb5
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%10 = load i32, i32* @a, align 4
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%11 = add i32 %10, 4
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br label %bb8
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bb7: ; preds = %bb5
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%12 = load i32, i32* @a, align 4
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br label %bb8
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bb8: ; preds = %bb7, %bb6, %bb4, %bb2, %bb
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%.0 = phi i32 [ %12, %bb7 ], [ %11, %bb6 ], [ %7, %bb4 ], [ 4, %bb2 ], [ 5, %bb ]
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br label %return
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return: ; preds = %bb8
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ret i32 %.0
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}
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;; NewGVN takes two passes to get test[6,8] and test[6,8]_fp's main part
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;; The icmp ne requires an equality table that inserts the inequalities for each
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;; discovered equality while processing.
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; CHECK-LABEL: @test6(
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define i1 @test6(i32 %x, i32 %y) {
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%cmp2 = icmp ne i32 %x, %y
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%cmp = icmp eq i32 %x, %y
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%cmp3 = icmp eq i32 %x, %y
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br i1 %cmp, label %same, label %different
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same:
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; CHECK: ret i1 false
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ret i1 %cmp2
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different:
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; CHECK: ret i1 false
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ret i1 %cmp3
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}
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; CHECK-LABEL: @test6_fp(
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define i1 @test6_fp(float %x, float %y) {
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%cmp2 = fcmp une float %x, %y
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%cmp = fcmp oeq float %x, %y
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%cmp3 = fcmp oeq float %x, %y
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br i1 %cmp, label %same, label %different
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same:
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; CHECK: ret i1 false
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ret i1 %cmp2
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different:
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; CHECK: ret i1 false
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ret i1 %cmp3
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}
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; CHECK-LABEL: @test8(
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define i1 @test8(i32 %x, i32 %y) {
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%cmp2 = icmp sle i32 %x, %y
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%cmp = icmp sgt i32 %x, %y
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%cmp3 = icmp sgt i32 %x, %y
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br i1 %cmp, label %same, label %different
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same:
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; CHECK: ret i1 false
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ret i1 %cmp2
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different:
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; CHECK: ret i1 false
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ret i1 %cmp3
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}
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; CHECK-LABEL: @test8_fp(
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define i1 @test8_fp(float %x, float %y) {
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%cmp2 = fcmp ule float %x, %y
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%cmp = fcmp ogt float %x, %y
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%cmp3 = fcmp ogt float %x, %y
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br i1 %cmp, label %same, label %different
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same:
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; CHECK: ret i1 false
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ret i1 %cmp2
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different:
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; CHECK: ret i1 false
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ret i1 %cmp3
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}
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