1 ; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -relocation-model=pic -post-RA-scheduler=1 -break-anti-dependencies=critical | FileCheck %s 2 3 ; PR20308 ( http://llvm.org/bugs/show_bug.cgi?id=20308 ) 4 ; The critical-anti-dependency-breaker must not use register def information from a kill inst. 5 ; This test case expects such an instruction to appear as a comment with def info for RDI. 6 ; There is an anti-dependency (WAR) hazard using RAX using default reg allocation and scheduling. 7 ; The post-RA-scheduler and critical-anti-dependency breaker can eliminate that hazard using R10. 8 ; That is the first free register that isn't used as a param in the call to "@Image". 9 10 @PartClass = external global i32 11 @NullToken = external global i64 12 13 ; CHECK-LABEL: Part_Create: 14 ; CHECK-DAG: # kill: RDI<def> 15 ; CHECK-DAG: movq PartClass@GOTPCREL(%rip), %r10 16 define i32 @Part_Create(i64* %Anchor, i32 %TypeNum, i32 %F, i32 %Z, i32* %Status, i64* %PartTkn) { 17 %PartObj = alloca i64*, align 8 18 %Vchunk = alloca i64, align 8 19 %1 = load i64, i64* @NullToken, align 4 20 store i64 %1, i64* %Vchunk, align 8 21 %2 = load i32, i32* @PartClass, align 4 22 call i32 @Image(i64* %Anchor, i32 %2, i32 0, i32 0, i32* %Status, i64* %PartTkn, i64** %PartObj) 23 call i32 @Create(i64* %Anchor) 24 ret i32 %2 25 } 26 27 declare i32 @Image(i64*, i32, i32, i32, i32*, i64*, i64**) 28 declare i32 @Create(i64*) 29
