8ebb3eac02
The legacy PM is deprecated, so update a bunch of lit tests running opt to use the new PM syntax when specifying the pipeline. In this patch focus has been put on test cases for ConstantMerge, ConstraintElimination, CorrelatedValuePropagation, GlobalDCE, GlobalOpt, SCCP, TailCallElim and PredicateInfo. Differential Revision: https://reviews.llvm.org/D114516
81 lines
1.8 KiB
LLVM
81 lines
1.8 KiB
LLVM
; RUN: opt -passes=globalopt -S < %s | FileCheck %s
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@G1 = internal global i32 5
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@G2 = internal global i32 5
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@G3 = internal global i32 5
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@G4 = internal global i32 5
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@G5 = internal global i32 5
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; CHECK-LABEL: @test1
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define internal i32 @test1() norecurse {
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; CHECK-NOT: @G1
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store i32 4, i32* @G1
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%a = load i32, i32* @G1
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; CHECK: ret
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ret i32 %a
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}
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; The load comes before the store which makes @G2 live before the call.
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; CHECK-LABEL: @test2
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define internal i32 @test2() norecurse {
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; CHECK-NOT: %G2
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%a = load i32, i32* @G2
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store i32 4, i32* @G2
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; CHECK: ret
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ret i32 %a
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}
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; This global is indexed by a GEP - this makes it partial alias and we bail out.
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; FIXME: We don't actually have to bail out in this case.
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; CHECK-LABEL: @test3
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define internal i32 @test3() norecurse {
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; CHECK-NOT: %G3
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%x = getelementptr i32,i32* @G3, i32 0
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%a = load i32, i32* %x
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store i32 4, i32* @G3
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; CHECK: ret
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ret i32 %a
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}
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; The global is casted away to a larger type then loaded. The store only partially
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; covers the load, so we must not demote.
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; CHECK-LABEL: @test4
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define internal i32 @test4() norecurse {
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; CHECK-NOT: %G4
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store i32 4, i32* @G4
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%x = bitcast i32* @G4 to i64*
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%a = load i64, i64* %x
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%b = trunc i64 %a to i32
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; CHECK: ret
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ret i32 %b
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}
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; The global is casted away to a smaller type then loaded. This one is fine.
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; CHECK-LABEL: @test5
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define internal i32 @test5() norecurse {
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; CHECK-NOT: @G5
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store i32 4, i32* @G5
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%x = bitcast i32* @G5 to i16*
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%a = load i16, i16* %x
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%b = zext i16 %a to i32
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; CHECK: ret
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ret i32 %b
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}
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define i32 @main() norecurse {
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%a = call i32 @test1()
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%b = call i32 @test2()
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%c = call i32 @test3()
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%d = call i32 @test4()
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%e = call i32 @test5()
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%x = or i32 %a, %b
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%y = or i32 %x, %c
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%z = or i32 %y, %d
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%w = or i32 %z, %e
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ret i32 %w
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}
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