5840f7197d
Currently, the floating point instructions that depend on rounding mode are correctly marked in the PPC back end with an implicit use of the RM register. Similarly, instructions that explicitly define the register are marked with an implicit def of the same register. So for the most part, RM-using code won't be moved across RM-setting instructions. However, calls are not marked as RM-setting instructions so code can be moved across calls. This is generally desired, but so is the ability to turn off this behaviour with an appropriate option - and -frounding-math really should be that option. This patch provides a set of call instructions (for direct and indirect calls) that are marked with an implicit def of the RM register. These will be used for calls that are marked with the strictfp attribute. Differential revision: https://reviews.llvm.org/D111433
129 lines
7.5 KiB
LLVM
129 lines
7.5 KiB
LLVM
; The strictfp version of test/CodeGen/PowerPC/cse-despit-rounding-mode.ll
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; With strictfp, the MachineIR optimizations need to assume that a call
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; can change the rounding mode and must not move/eliminate the repeated
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; multiply/convert instructions in this test.
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; RUN: llc -verify-machineinstrs --mtriple powerpc64le-unknown-linux-gnu \
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; RUN: -mcpu=pwr8 -ppc-asm-full-reg-names < %s | grep 'xvrdpic' | count 4
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; RUN: llc -verify-machineinstrs --mtriple powerpc-unknown-linux-gnu \
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; RUN: -mcpu=pwr9 -ppc-asm-full-reg-names < %s | grep 'xvrdpic' | count 4
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; RUN: llc -verify-machineinstrs --mtriple powerpc64le-unknown-linux-gnu \
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; RUN: -mcpu=pwr10 -ppc-asm-full-reg-names < %s | grep 'xvrdpic' | count 4
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; RUN: llc -verify-machineinstrs --mtriple powerpc64le-unknown-linux-gnu \
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; RUN: -mcpu=pwr8 -ppc-asm-full-reg-names < %s | grep 'xvmuldp' | count 4
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; RUN: llc -verify-machineinstrs --mtriple powerpc-unknown-linux-gnu \
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; RUN: -mcpu=pwr9 -ppc-asm-full-reg-names < %s | grep 'xvmuldp' | count 4
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; RUN: llc -verify-machineinstrs --mtriple powerpc64le-unknown-linux-gnu \
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; RUN: -mcpu=pwr10 -ppc-asm-full-reg-names < %s | grep 'xvmuldp' | count 4
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@IndirectCallPtr = dso_local local_unnamed_addr global void (...)* null, align 8
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define dso_local signext i32 @func1() local_unnamed_addr #0 {
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entry:
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tail call void bitcast (void (...)* @directCall to void ()*)() #0
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%0 = tail call <2 x double> @llvm.experimental.constrained.rint.v2f64(<2 x double> <double -9.990000e+01, double 9.990000e+01>, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
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%vecext = extractelement <2 x double> %0, i32 0
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%sub = tail call double @llvm.experimental.constrained.fsub.f64(double %vecext, double -9.900000e+01, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
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%conv = tail call i32 @llvm.experimental.constrained.fptosi.i32.f64(double %sub, metadata !"fpexcept.ignore") #0
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tail call void bitcast (void (...)* @directCall to void ()*)() #0
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%1 = tail call <2 x double> @llvm.experimental.constrained.rint.v2f64(<2 x double> <double -9.990000e+01, double 9.990000e+01>, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
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%vecext3 = extractelement <2 x double> %1, i32 1
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%cmp = tail call i1 @llvm.experimental.constrained.fcmp.f64(double %vecext3, double 9.900000e+01, metadata !"une", metadata !"fpexcept.ignore") #0
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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tail call void @exit(i32 signext 2) #0
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unreachable
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if.end: ; preds = %entry
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ret i32 %conv
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}
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declare void @directCall(...) local_unnamed_addr
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declare double @llvm.experimental.constrained.fsub.f64(double, double, metadata, metadata)
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declare i32 @llvm.experimental.constrained.fptosi.i32.f64(double, metadata)
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declare i1 @llvm.experimental.constrained.fcmp.f64(double, double, metadata, metadata)
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declare void @exit(i32 signext) local_unnamed_addr
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define dso_local signext i32 @func2() local_unnamed_addr #0 {
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entry:
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%call = tail call <2 x double> bitcast (<2 x double> (...)* @getvector1 to <2 x double> ()*)() #0
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%call1 = tail call <2 x double> bitcast (<2 x double> (...)* @getvector2 to <2 x double> ()*)() #0
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tail call void bitcast (void (...)* @directCall to void ()*)() #0
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%mul = tail call <2 x double> @llvm.experimental.constrained.fmul.v2f64(<2 x double> %call, <2 x double> %call1, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
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%vecext = extractelement <2 x double> %mul, i32 0
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%cmp = tail call i1 @llvm.experimental.constrained.fcmp.f64(double %vecext, double 4.000000e+00, metadata !"oeq", metadata !"fpexcept.ignore") #0
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br i1 %cmp, label %cleanup, label %if.end
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if.end: ; preds = %entry
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tail call void bitcast (void (...)* @directCall to void ()*)() #0
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%mul10 = tail call <2 x double> @llvm.experimental.constrained.fmul.v2f64(<2 x double> %call, <2 x double> %call1, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
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%0 = tail call i32 @llvm.ppc.vsx.xvcmpeqdp.p(i32 2, <2 x double> %mul, <2 x double> %mul10) #0
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br label %cleanup
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cleanup: ; preds = %entry, %if.end
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%retval.0 = phi i32 [ %0, %if.end ], [ 11, %entry ]
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ret i32 %retval.0
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}
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declare <2 x double> @getvector1(...) local_unnamed_addr
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declare <2 x double> @getvector2(...) local_unnamed_addr
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declare <2 x double> @llvm.experimental.constrained.fmul.v2f64(<2 x double>, <2 x double>, metadata, metadata)
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declare i32 @llvm.ppc.vsx.xvcmpeqdp.p(i32, <2 x double>, <2 x double>)
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define dso_local signext i32 @func3() local_unnamed_addr #0 {
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entry:
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%0 = load void ()*, void ()** bitcast (void (...)** @IndirectCallPtr to void ()**), align 8
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tail call void %0() #0
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%1 = tail call <2 x double> @llvm.experimental.constrained.rint.v2f64(<2 x double> <double -9.990000e+01, double 9.990000e+01>, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
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%vecext = extractelement <2 x double> %1, i32 0
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%sub = tail call double @llvm.experimental.constrained.fsub.f64(double %vecext, double -9.900000e+01, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
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%conv = tail call i32 @llvm.experimental.constrained.fptosi.i32.f64(double %sub, metadata !"fpexcept.ignore") #0
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%2 = load void ()*, void ()** bitcast (void (...)** @IndirectCallPtr to void ()**), align 8
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tail call void %2() #0
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%3 = tail call <2 x double> @llvm.experimental.constrained.rint.v2f64(<2 x double> <double -9.990000e+01, double 9.990000e+01>, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
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%vecext4 = extractelement <2 x double> %3, i32 1
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%cmp = tail call i1 @llvm.experimental.constrained.fcmp.f64(double %vecext4, double 9.900000e+01, metadata !"une", metadata !"fpexcept.ignore") #0
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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tail call void @exit(i32 signext 2) #0
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unreachable
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if.end: ; preds = %entry
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ret i32 %conv
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}
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define dso_local signext i32 @func4() local_unnamed_addr #0 {
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entry:
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%call = tail call <2 x double> bitcast (<2 x double> (...)* @getvector1 to <2 x double> ()*)() #0
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%call1 = tail call <2 x double> bitcast (<2 x double> (...)* @getvector2 to <2 x double> ()*)() #0
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%0 = load void ()*, void ()** bitcast (void (...)** @IndirectCallPtr to void ()**), align 8
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tail call void %0() #0
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%mul = tail call <2 x double> @llvm.experimental.constrained.fmul.v2f64(<2 x double> %call, <2 x double> %call1, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
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%vecext = extractelement <2 x double> %mul, i32 0
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%cmp = tail call i1 @llvm.experimental.constrained.fcmp.f64(double %vecext, double 4.000000e+00, metadata !"oeq", metadata !"fpexcept.ignore") #0
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br i1 %cmp, label %cleanup, label %if.end
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if.end: ; preds = %entry
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%1 = load void ()*, void ()** bitcast (void (...)** @IndirectCallPtr to void ()**), align 8
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tail call void %1() #0
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%mul11 = tail call <2 x double> @llvm.experimental.constrained.fmul.v2f64(<2 x double> %call, <2 x double> %call1, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
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%2 = tail call i32 @llvm.ppc.vsx.xvcmpeqdp.p(i32 2, <2 x double> %mul, <2 x double> %mul11) #0
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br label %cleanup
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cleanup: ; preds = %entry, %if.end
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%retval.0 = phi i32 [ %2, %if.end ], [ 11, %entry ]
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ret i32 %retval.0
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}
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declare <2 x double> @llvm.experimental.constrained.rint.v2f64(<2 x double>, metadata, metadata)
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attributes #0 = { nounwind strictfp }
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