llvm-project/llvm/test/CodeGen/PowerPC/2008-03-18-RegScavengerAsse...

; RUN: llc -verify-machineinstrs < %s -mtriple=ppc64--

define i16 @test(i8* %d1, i16* %d2) {
 %tmp237 = call i16 asm "lhbrx $0, $2, $1", "=r,r,bO,m"( i8* %d1, i32 0, i16* %d2 )
 ret i16 %tmp237
}
PowerPC: Do not use llc -march in tests. `llc -march` is problematic because it only switches the target architecture, but leaves the operating system unchanged. This occasionally leads to indeterministic tests because the OS from LLVM_DEFAULT_TARGET_TRIPLE is used. However we can simply always use `llc -mtriple` instead. This changes all the tests to do this to avoid people using -march when they copy and paste parts of tests. This patch: - Removes -march if the .ll file already has a matching `target triple` directive or -mtriple argument. - In all other cases changes -march=ppc32/-march=ppc64 to -mtriple=ppc32--/-mtriple=ppc64-- See also the discussion in https://reviews.llvm.org/D35287 llvm-svn: 309754 2017-08-02 06:20:41 +08:00			`; RUN: llc -verify-machineinstrs < %s -mtriple=ppc64--`
Fix live variables issues: 1. If part of a register is re-defined, an implicit kill and an implicit def are added to denote read / mod / write. However, this should only be necessary if the register is actually read later. This is a performance issue. 2. If a sub-register is being defined, and it doesn't have a previous use, do not add a implicit kill to the last use of a super-register: = EAX, AX<imp-use,kill> ... AX = In this case, EAX is live but AX is killed, this is wrong and will cause the coalescer to do bad things. llvm-svn: 48521 2008-03-19 08:52:20 +08:00
			`define i16 @test(i8* %d1, i16* %d2) {`
			`%tmp237 = call i16 asm "lhbrx $0, $2, $1", "=r,r,bO,m"( i8* %d1, i32 0, i16* %d2 )`
			`ret i16 %tmp237`
			`}`