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llvm-project/llvm/test/CodeGen/X86/float-conv-elim.ll

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X86: 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. See also the discussion in https://reviews.llvm.org/D35287 llvm-svn: 309774
2017-08-02 08:28:10 +08:00
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mcpu=x86-64 < %s | FileCheck %s
SelectionDAG: fold (fp_to_u/sint (s/uint_to_fp)) here too Update SPARC tests to match. From: Fiona Glaser <fglaser@apple.com> llvm-svn: 229438
2015-02-17 05:47:58 +08:00
; Make sure the float conversion is folded away as it should be.
; CHECK-LABEL: foo
; CHECK-NOT: cvt
; CHECK: movzbl
define i32 @foo(i8 %a) #0 {
%conv = uitofp i8 %a to float
%conv1 = fptosi float %conv to i32
ret i32 %conv1
}
; CHECK-LABEL: foo2
; CHECK-NOT: cvt
; CHECK: movsbl
define i32 @foo2(i8 %a) #0 {
%conv = sitofp i8 %a to float
%conv1 = fptosi float %conv to i32
ret i32 %conv1
}
; CHECK-LABEL: bar
; CHECK-NOT: cvt
[X86] Teach X86FixupBWInsts to promote MOV8rr/MOV16rr to MOV32rr. This re-applies r268760, reverted in r268794. Fixes http://llvm.org/PR27670 The original imp-defs assertion was way overzealous: forward all implicit operands, except imp-defs of the new super-reg def (r268787 for GR64, but also possible for GR16->GR32), or imp-uses of the new super-reg use. While there, mark the source use as Undef, and add an imp-use of the old source reg: that should cover any case of dead super-regs. At the stage the pass runs, flags are unlikely to matter anyway; still, let's be as correct as possible. Also add MIR tests for the various interesting cases. Original commit message: Codesize is less (16) or equal (8), and we avoid partial dependencies. Differential Revision: http://reviews.llvm.org/D19999 llvm-svn: 268831
2016-05-07 09:11:17 +08:00
; CHECK: movl
SelectionDAG: fold (fp_to_u/sint (s/uint_to_fp)) here too Update SPARC tests to match. From: Fiona Glaser <fglaser@apple.com> llvm-svn: 229438
2015-02-17 05:47:58 +08:00
define zeroext i8 @bar(i8 zeroext %a) #0 {
%conv = uitofp i8 %a to float
%conv1 = fptoui float %conv to i8
ret i8 %conv1
}
attributes #0 = { nounwind ssp uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }