a1710eb3cd
The LIT test cases were migrated with the script provided by Nikita Popov. No manual changes were made. Committed without review since no functional changes, after consultation with uweigand.
414 lines
8.6 KiB
LLVM
414 lines
8.6 KiB
LLVM
; Test that floating-point compares are omitted if CC already has the
|
|
; right value.
|
|
;
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 -no-integrated-as | FileCheck %s
|
|
|
|
declare float @llvm.fabs.f32(float %f)
|
|
|
|
; Test addition followed by EQ, which can use the CC result of the addition.
|
|
define float @f1(float %a, float %b, ptr %dest) {
|
|
; CHECK-LABEL: f1:
|
|
; CHECK: aebr %f0, %f2
|
|
; CHECK-NEXT: ber %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = fadd float %a, %b
|
|
%cmp = fcmp oeq float %res, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %b, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %res
|
|
}
|
|
|
|
; ...and again with LT.
|
|
define float @f2(float %a, float %b, ptr %dest) {
|
|
; CHECK-LABEL: f2:
|
|
; CHECK: aebr %f0, %f2
|
|
; CHECK-NEXT: blr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = fadd float %a, %b
|
|
%cmp = fcmp olt float %res, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %b, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %res
|
|
}
|
|
|
|
; ...and again with GT.
|
|
define float @f3(float %a, float %b, ptr %dest) {
|
|
; CHECK-LABEL: f3:
|
|
; CHECK: aebr %f0, %f2
|
|
; CHECK-NEXT: bhr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = fadd float %a, %b
|
|
%cmp = fcmp ogt float %res, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %b, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %res
|
|
}
|
|
|
|
; ...and again with UEQ.
|
|
define float @f4(float %a, float %b, ptr %dest) {
|
|
; CHECK-LABEL: f4:
|
|
; CHECK: aebr %f0, %f2
|
|
; CHECK-NEXT: bnlhr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = fadd float %a, %b
|
|
%cmp = fcmp ueq float %res, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %b, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %res
|
|
}
|
|
|
|
; Subtraction also provides a zero-based CC value.
|
|
define float @f5(float %a, float %b, ptr %dest) {
|
|
; CHECK-LABEL: f5:
|
|
; CHECK: seb %f0, 0(%r2)
|
|
; CHECK-NEXT: bnher %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%cur = load float, ptr %dest
|
|
%res = fsub float %a, %cur
|
|
%cmp = fcmp ult float %res, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %b, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %res
|
|
}
|
|
|
|
; Test the result of LOAD POSITIVE.
|
|
define float @f6(float %dummy, float %a, ptr %dest) {
|
|
; CHECK-LABEL: f6:
|
|
; CHECK: lpebr %f0, %f2
|
|
; CHECK-NEXT: bhr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = call float @llvm.fabs.f32(float %a)
|
|
%cmp = fcmp ogt float %res, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %res, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %res
|
|
}
|
|
|
|
; Test the result of LOAD NEGATIVE.
|
|
define float @f7(float %dummy, float %a, ptr %dest) {
|
|
; CHECK-LABEL: f7:
|
|
; CHECK: lnebr %f0, %f2
|
|
; CHECK-NEXT: blr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%abs = call float @llvm.fabs.f32(float %a)
|
|
%res = fneg float %abs
|
|
%cmp = fcmp olt float %res, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %res, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %res
|
|
}
|
|
|
|
; Test the result of LOAD COMPLEMENT.
|
|
define float @f8(float %dummy, float %a, ptr %dest) {
|
|
; CHECK-LABEL: f8:
|
|
; CHECK: lcebr %f0, %f2
|
|
; CHECK-NEXT: bler %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = fneg float %a
|
|
%cmp = fcmp ole float %res, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %res, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %res
|
|
}
|
|
|
|
; Multiplication (for example) does not modify CC.
|
|
define float @f9(float %a, float %b, ptr %dest) {
|
|
; CHECK-LABEL: f9:
|
|
; CHECK: meebr %f0, %f2
|
|
; CHECK-NEXT: ltebr %f0, %f0
|
|
; CHECK-NEXT: blhr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = fmul float %a, %b
|
|
%cmp = fcmp one float %res, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %b, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %res
|
|
}
|
|
|
|
; Test a combination involving a CC-setting instruction followed by
|
|
; a non-CC-setting instruction.
|
|
define float @f10(float %a, float %b, float %c, ptr %dest) {
|
|
; CHECK-LABEL: f10:
|
|
; CHECK: aebr %f0, %f2
|
|
; CHECK-NEXT: debr %f0, %f4
|
|
; CHECK-NEXT: ltebr %f0, %f0
|
|
; CHECK-NEXT: bner %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%add = fadd float %a, %b
|
|
%res = fdiv float %add, %c
|
|
%cmp = fcmp une float %res, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %b, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %res
|
|
}
|
|
|
|
; Test a case where CC is set based on a different register from the
|
|
; compare input.
|
|
define float @f11(float %a, float %b, float %c, ptr %dest1, ptr %dest2) {
|
|
; CHECK-LABEL: f11:
|
|
; CHECK: aebr %f0, %f2
|
|
; CHECK-NEXT: sebr %f4, %f0
|
|
; CHECK-DAG: ste %f4, 0(%r2)
|
|
; CHECK-DAG: ltebr %f0, %f0
|
|
; CHECK-NEXT: ber %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%add = fadd float %a, %b
|
|
%sub = fsub float %c, %add
|
|
store float %sub, ptr %dest1
|
|
%cmp = fcmp oeq float %add, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %sub, ptr %dest2
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %add
|
|
}
|
|
|
|
; Test that LER gets converted to LTEBR where useful.
|
|
define float @f12(float %dummy, float %val, ptr %dest) {
|
|
; CHECK-LABEL: f12:
|
|
; CHECK: ltebr %f0, %f2
|
|
; CHECK-NEXT: #APP
|
|
; CHECK-NEXT: blah %f0
|
|
; CHECK-NEXT: #NO_APP
|
|
; CHECK-NEXT: blr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
call void asm sideeffect "blah $0", "{f0}"(float %val)
|
|
%cmp = fcmp olt float %val, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %val, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %val
|
|
}
|
|
|
|
; Test that LDR gets converted to LTDBR where useful.
|
|
define double @f13(double %dummy, double %val, ptr %dest) {
|
|
; CHECK-LABEL: f13:
|
|
; CHECK: ltdbr %f0, %f2
|
|
; CHECK-NEXT: #APP
|
|
; CHECK-NEXT: blah %f0
|
|
; CHECK-NEXT: #NO_APP
|
|
; CHECK-NEXT: blr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
call void asm sideeffect "blah $0", "{f0}"(double %val)
|
|
%cmp = fcmp olt double %val, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store double %val, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret double %val
|
|
}
|
|
|
|
; Test that LXR gets converted to LTXBR where useful.
|
|
define void @f14(ptr %ptr1, ptr %ptr2) {
|
|
; CHECK-LABEL: f14:
|
|
; CHECK: ltxbr
|
|
; CHECK-NEXT: dxbr
|
|
; CHECK-NEXT: std
|
|
; CHECK-NEXT: std
|
|
; CHECK-NEXT: mxbr
|
|
; CHECK-NEXT: std
|
|
; CHECK-NEXT: std
|
|
; CHECK-NEXT: blr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%val1 = load fp128, ptr %ptr1
|
|
%val2 = load fp128, ptr %ptr2
|
|
%div = fdiv fp128 %val1, %val2
|
|
store fp128 %div, ptr %ptr1
|
|
%mul = fmul fp128 %val1, %val2
|
|
store fp128 %mul, ptr %ptr2
|
|
%cmp = fcmp olt fp128 %val1, 0xL00000000000000000000000000000000
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
call void asm sideeffect "blah", ""()
|
|
br label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
; Test a case where it is the source rather than destination of LER that
|
|
; we need.
|
|
define float @f15(float %val, float %dummy, ptr %dest) {
|
|
; CHECK-LABEL: f15:
|
|
; CHECK: ltebr %f2, %f0
|
|
; CHECK-NEXT: #APP
|
|
; CHECK-NEXT: blah %f2
|
|
; CHECK-NEXT: #NO_APP
|
|
; CHECK-NEXT: blr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
call void asm sideeffect "blah $0", "{f2}"(float %val)
|
|
%cmp = fcmp olt float %val, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %val, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %val
|
|
}
|
|
|
|
; Test a case where it is the source rather than destination of LDR that
|
|
; we need.
|
|
define double @f16(double %val, double %dummy, ptr %dest) {
|
|
; CHECK-LABEL: f16:
|
|
; CHECK: ltdbr %f2, %f0
|
|
; CHECK-NEXT: #APP
|
|
; CHECK-NEXT: blah %f2
|
|
; CHECK-NEXT: #NO_APP
|
|
; CHECK-NEXT: blr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
call void asm sideeffect "blah $0", "{f2}"(double %val)
|
|
%cmp = fcmp olt double %val, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store double %val, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret double %val
|
|
}
|
|
|
|
; Repeat f2 with a comparison against -0.
|
|
define float @f17(float %a, float %b, ptr %dest) {
|
|
; CHECK-LABEL: f17:
|
|
; CHECK: aebr %f0, %f2
|
|
; CHECK-NEXT: blr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = fadd float %a, %b
|
|
%cmp = fcmp olt float %res, -0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %b, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %res
|
|
}
|
|
|
|
; Test another form of f7 in which the condition is based on the unnegated
|
|
; result. This is what InstCombine would produce.
|
|
define float @f18(float %dummy, float %a, ptr %dest) {
|
|
; CHECK-LABEL: f18:
|
|
; CHECK: # %bb.0: # %entry
|
|
; CHECK-NEXT: lnebr %f0, %f2
|
|
; CHECK-NEXT: blr %r14
|
|
; CHECK-NEXT: .LBB17_1: # %store
|
|
; CHECK-NEXT: ste %f0, 0(%r2)
|
|
; CHECK-NEXT: br %r14
|
|
entry:
|
|
%abs = call float @llvm.fabs.f32(float %a)
|
|
%res = fneg float %abs
|
|
%cmp = fcmp ogt float %abs, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %res, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %res
|
|
}
|
|
|
|
; Similarly for f8.
|
|
define float @f19(float %dummy, float %a, ptr %dest) {
|
|
; CHECK-LABEL: f19:
|
|
; CHECK: # %bb.0: # %entry
|
|
; CHECK-NEXT: lcebr %f0, %f2
|
|
; CHECK-NEXT: bler %r14
|
|
; CHECK-NEXT: .LBB18_1: # %store
|
|
; CHECK-NEXT: ste %f0, 0(%r2)
|
|
; CHECK-NEXT: br %r14
|
|
entry:
|
|
%res = fneg float %a
|
|
%cmp = fcmp oge float %a, 0.0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store float %res, ptr %dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret float %res
|
|
}
|