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[ArgPromotion] Add test with dead GEP when promoting.

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This adds test coverage for the case where we do argument promotion and
there's a dead GEP that should be removed/ignored.
This commit is contained in:
Florian Hahn 2021-01-03 15:22:46 +00:00
parent c88238ea77
commit 718cb51e52
1 changed files with 34 additions and 0 deletions
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34
test/Transforms/ArgumentPromotion/aggregate-promote-dead-gep.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --scrub-attributes
; RUN: opt < %s -argpromotion -S | FileCheck %s
; RUN: opt < %s -passes=argpromotion -S | FileCheck %s
%T = type { i32, i32, i32, i32 }
@G = constant %T { i32 0, i32 0, i32 17, i32 25 }
define internal i32 @test(%T* %p) {
; CHECK-LABEL: define {{[^@]+}}@test
; CHECK-SAME: (i32 [[P_0_3_VAL:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[V:%.*]] = add i32 [[P_0_3_VAL]], 10
; CHECK-NEXT: ret i32 [[V]]
;
entry:
%a.gep = getelementptr %T, %T* %p, i64 0, i32 3
%b.gep = getelementptr %T, %T* %p, i64 0, i32 2
%a = load i32, i32* %a.gep
%v = add i32 %a, 10
ret i32 %v
}
define i32 @caller() {
; CHECK-LABEL: define {{[^@]+}}@caller() {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[G_IDX:%.*]] = getelementptr [[T:%.*]], %T* @G, i64 0, i32 3
; CHECK-NEXT: [[G_IDX_VAL:%.*]] = load i32, i32* [[G_IDX]], align 4
; CHECK-NEXT: [[V:%.*]] = call i32 @test(i32 [[G_IDX_VAL]])
; CHECK-NEXT: ret i32 [[V]]
;
entry:
%v = call i32 @test(%T* @G)
ret i32 %v
}