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https://github.com/c64scene-ar/llvm-6502.git
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57 lines
1.3 KiB
LLVM
57 lines
1.3 KiB
LLVM
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; RUN: opt -inline < %s -S -o - -inline-threshold=10 | FileCheck %s
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define i32 @outer1() {
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; CHECK: @outer1
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; CHECK-NOT: call
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; CHECK: ret i32
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%ptr = alloca i32
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%ptr1 = getelementptr inbounds i32* %ptr, i32 0
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%ptr2 = getelementptr inbounds i32* %ptr, i32 42
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%result = call i32 @inner1(i32* %ptr1, i32* %ptr2)
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ret i32 %result
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}
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define i32 @inner1(i32* %begin, i32* %end) {
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%begin.i = ptrtoint i32* %begin to i32
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%end.i = ptrtoint i32* %end to i32
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%distance = sub i32 %end.i, %begin.i
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%icmp = icmp sle i32 %distance, 42
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br i1 %icmp, label %then, label %else
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then:
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ret i32 3
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else:
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%t = load i32* %begin
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ret i32 %t
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}
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define i32 @outer2(i32* %ptr) {
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; Test that an inbounds GEP disables this -- it isn't safe in general as
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; wrapping changes the behavior of lessthan and greaterthan comparisions.
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; CHECK: @outer2
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; CHECK: call i32 @inner2
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; CHECK: ret i32
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%ptr1 = getelementptr i32* %ptr, i32 0
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%ptr2 = getelementptr i32* %ptr, i32 42
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%result = call i32 @inner2(i32* %ptr1, i32* %ptr2)
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ret i32 %result
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}
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define i32 @inner2(i32* %begin, i32* %end) {
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%begin.i = ptrtoint i32* %begin to i32
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%end.i = ptrtoint i32* %end to i32
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%distance = sub i32 %end.i, %begin.i
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%icmp = icmp sle i32 %distance, 42
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br i1 %icmp, label %then, label %else
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then:
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ret i32 3
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else:
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%t = load i32* %begin
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ret i32 %t
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}
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