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