66 lines
2.2 KiB
LLVM
66 lines
2.2 KiB
LLVM
; RUN: opt < %s -passes=argpromotion -S | FileCheck %s
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; Unused pointer argument should be removed from the function's signature
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; while the used arguments should be promoted if they are pointers.
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; The pass should not touch any unused non-pointer arguments.
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define internal i32 @callee(i1 %c, i1 %d, i32* %used, i32* %unused) nounwind {
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; CHECK-LABEL: define {{[^@]+}}@callee
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; CHECK-SAME: (i1 [[C:%.*]], i1 [[D:%.*]], i32 [[USED_VAL:%.*]]) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[C]], label %if, label %else
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; CHECK: if:
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; CHECK-NEXT: ret i32 [[USED_VAL]]
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; CHECK: else:
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; CHECK-NEXT: ret i32 -1
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;
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entry:
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%x = load i32, i32* %used, align 4
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br i1 %c, label %if, label %else
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if:
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ret i32 %x
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else:
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ret i32 -1
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}
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; Unused byval argument should be removed from the function's signature
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; while the used arguments should be promoted if they are pointers.
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; The pass should not touch any unused non-pointer arguments.
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define internal i32 @callee_byval(i1 %c, i1 %d, i32* byval(i32) align 4 %used, i32* byval(i32) align 4 %unused) nounwind {
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; CHECK-LABEL: define {{[^@]+}}@callee_byval
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; CHECK-SAME: (i1 [[C:%.*]], i1 [[D:%.*]], i32 [[USED_VAL:%.*]]) #[[ATTR0]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[C]], label %if, label %else
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; CHECK: if:
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; CHECK-NEXT: ret i32 [[USED_VAL]]
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; CHECK: else:
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; CHECK-NEXT: ret i32 -1
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;
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entry:
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%x = load i32, i32* %used, align 4
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br i1 %c, label %if, label %else
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if:
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ret i32 %x
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else:
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ret i32 -1
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}
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define i32 @caller(i1 %c, i1 %d, i32* %arg) nounwind {
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; CHECK-LABEL: define {{[^@]+}}@caller
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; CHECK-SAME: (i1 [[C:%.*]], i1 [[D:%.*]], i32* [[ARG:%.*]]) #[[ATTR0]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[ARG_VAL_0:%.*]] = load i32, i32* [[ARG]], align 4
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; CHECK-NEXT: [[RES_0:%.*]] = call i32 @callee_byval(i1 [[C]], i1 [[D]], i32 [[ARG_VAL_0]]) #[[ATTR0]]
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; CHECK-NEXT: [[ARG_VAL_1:%.*]] = load i32, i32* [[ARG]], align 4
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; CHECK-NEXT: [[RES_1:%.*]] = call i32 @callee(i1 [[C]], i1 [[D]], i32 [[ARG_VAL_1]]) #[[ATTR0]]
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; CHECK-NEXT: ret i32 1
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;
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entry:
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call i32 @callee_byval(i1 %c, i1 %d, i32* byval(i32) align 4 %arg, i32* byval(i32) align 4 %arg) nounwind
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call i32 @callee(i1 %c, i1 %d, i32* %arg, i32* %arg) nounwind
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ret i32 1
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}
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