forked from OSchip/llvm-project
122 lines
2.9 KiB
LLVM
122 lines
2.9 KiB
LLVM
; RUN: opt -attributor --attributor-disable=false -S < %s | FileCheck %s
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; TODO: Add max-iteration check
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; ModuleID = 'value-simplify.ll'
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source_filename = "value-simplify.ll"
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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declare void @f(i32)
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; Test1: Replace argument with constant
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define internal void @test1(i32 %a) {
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; CHECK: tail call void @f(i32 1)
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tail call void @f(i32 %a)
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ret void
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}
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define void @test1_helper() {
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tail call void @test1(i32 1)
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ret void
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}
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; TEST 2 : Simplify return value
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define i32 @return0() {
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ret i32 0
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}
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define i32 @return1() {
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ret i32 1
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}
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; CHECK: define i32 @test2_1(i1 %c)
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define i32 @test2_1(i1 %c) {
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br i1 %c, label %if.true, label %if.false
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if.true:
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%call = tail call i32 @return0()
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; FIXME: %ret0 should be replaced with i32 1.
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; CHECK: %ret0 = add i32 0, 1
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%ret0 = add i32 %call, 1
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br label %end
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if.false:
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%ret1 = tail call i32 @return1()
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br label %end
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end:
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; FIXME: %ret should be replaced with i32 1.
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; CHECK: %ret = phi i32 [ %ret0, %if.true ], [ 1, %if.false ]
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%ret = phi i32 [ %ret0, %if.true ], [ %ret1, %if.false ]
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; FIXME: ret i32 1
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; CHECK: ret i32 %ret
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ret i32 %ret
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}
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; CHECK: define i32 @test2_2(i1 %c)
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define i32 @test2_2(i1 %c) {
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; FIXME: %ret should be replaced with i32 1.
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%ret = tail call i32 @test2_1(i1 %c)
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; FIXME: ret i32 1
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; CHECK: ret i32 %ret
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ret i32 %ret
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}
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declare void @use(i32)
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; CHECK: define void @test3(i1 %c)
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define void @test3(i1 %c) {
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br i1 %c, label %if.true, label %if.false
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if.true:
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br label %end
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if.false:
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%ret1 = tail call i32 @return1()
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br label %end
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end:
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; CHECK: %r = phi i32 [ 1, %if.true ], [ 1, %if.false ]
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%r = phi i32 [ 1, %if.true ], [ %ret1, %if.false ]
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; CHECK: tail call void @use(i32 1)
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tail call void @use(i32 %r)
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ret void
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}
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define void @test-select-phi(i1 %c) {
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%select-same = select i1 %c, i32 1, i32 1
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; CHECK: tail call void @use(i32 1)
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tail call void @use(i32 %select-same)
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%select-not-same = select i1 %c, i32 1, i32 0
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; CHECK: tail call void @use(i32 %select-not-same)
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tail call void @use(i32 %select-not-same)
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br i1 %c, label %if-true, label %if-false
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if-true:
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br label %end
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if-false:
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br label %end
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end:
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%phi-same = phi i32 [ 1, %if-true ], [ 1, %if-false ]
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%phi-not-same = phi i32 [ 0, %if-true ], [ 1, %if-false ]
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%phi-same-prop = phi i32 [ 1, %if-true ], [ %select-same, %if-false ]
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%phi-same-undef = phi i32 [ 1, %if-true ], [ undef, %if-false ]
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%select-not-same-undef = select i1 %c, i32 %phi-not-same, i32 undef
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; CHECK: tail call void @use(i32 1)
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tail call void @use(i32 %phi-same)
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; CHECK: tail call void @use(i32 %phi-not-same)
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tail call void @use(i32 %phi-not-same)
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; CHECK: tail call void @use(i32 1)
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tail call void @use(i32 %phi-same-prop)
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; CHECK: tail call void @use(i32 1)
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tail call void @use(i32 %phi-same-undef)
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; CHECK: tail call void @use(i32 %select-not-same-undef)
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tail call void @use(i32 %select-not-same-undef)
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ret void
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}
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