forked from OSchip/llvm-project
175 lines
4.1 KiB
LLVM
175 lines
4.1 KiB
LLVM
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; RUN: llc -mtriple=thumbv7m -arm-disable-cgp=false %s -o - | FileCheck %s --check-prefix=CHECK-COMMON --check-prefix=CHECK-NODSP
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; RUN: llc -mtriple=thumbv8m.main -arm-disable-cgp=false %s -o - | FileCheck %s --check-prefix=CHECK-COMMON --check-prefix=CHECK-NODSP
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; RUN: llc -mtriple=thumbv8m.main -arm-disable-cgp=false -arm-enable-scalar-dsp=true -mcpu=cortex-m33 %s -o - | FileCheck %s --check-prefix=CHECK-COMMON --check-prefix=CHECK-DSP
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; RUN: llc -mtriple=thumbv7em %s -arm-disable-cgp=false -arm-enable-scalar-dsp=true -arm-enable-scalar-dsp-imms=true -o - | FileCheck %s --check-prefix=CHECK-COMMON --check-prefix=CHECK-DSP-IMM
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; Test that ARMCodeGenPrepare can handle:
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; - loops
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; - call operands
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; - call return values
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; - ret instructions
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; We use nuw on the arithmetic instructions to avoid complications.
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; Check that the arguments are extended but then nothing else is.
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; This also ensures that the pass can handle loops.
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; CHECK-COMMON-LABEL: phi_feeding_phi_args
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; CHECK-COMMON: uxtb
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; CHECK-COMMON: uxtb
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; CHECK-NOT: uxtb
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define void @phi_feeding_phi_args(i8 %a, i8 %b) {
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entry:
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%0 = icmp ugt i8 %a, %b
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br i1 %0, label %preheader, label %empty
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empty:
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br label %preheader
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preheader:
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%1 = phi i8 [ %a, %entry ], [ %b, %empty ]
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br label %loop
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loop:
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%val = phi i8 [ %1, %preheader ], [ %inc2, %if.end ]
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%cmp = icmp ult i8 %val, 254
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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%inc = sub nuw i8 %val, 2
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br label %if.end
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if.else:
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%inc1 = shl nuw i8 %val, 1
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br label %if.end
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if.end:
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%inc2 = phi i8 [ %inc, %if.then], [ %inc1, %if.else ]
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%cmp1 = icmp eq i8 %inc2, 255
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br i1 %cmp1, label %exit, label %loop
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exit:
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ret void
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}
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; Same as above, but as the args are zeroext, we shouldn't see any uxts.
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; CHECK-COMMON-LABEL: phi_feeding_phi_zeroext_args
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; CHECK-COMMON-NOT: uxt
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define void @phi_feeding_phi_zeroext_args(i8 zeroext %a, i8 zeroext %b) {
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entry:
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%0 = icmp ugt i8 %a, %b
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br i1 %0, label %preheader, label %empty
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empty:
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br label %preheader
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preheader:
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%1 = phi i8 [ %a, %entry ], [ %b, %empty ]
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br label %loop
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loop:
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%val = phi i8 [ %1, %preheader ], [ %inc2, %if.end ]
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%cmp = icmp ult i8 %val, 254
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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%inc = sub nuw i8 %val, 2
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br label %if.end
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if.else:
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%inc1 = shl nuw i8 %val, 1
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br label %if.end
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if.end:
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%inc2 = phi i8 [ %inc, %if.then], [ %inc1, %if.else ]
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%cmp1 = icmp eq i8 %inc2, 255
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br i1 %cmp1, label %exit, label %loop
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exit:
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ret void
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}
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; Just check that phis also work with i16s.
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; CHECK-COMMON-LABEL: phi_i16:
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; CHECK-COMMON-NOT: uxt
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define void @phi_i16() {
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entry:
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br label %loop
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loop:
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%val = phi i16 [ 0, %entry ], [ %inc2, %if.end ]
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%cmp = icmp ult i16 %val, 128
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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%inc = add nuw i16 %val, 2
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br label %if.end
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if.else:
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%inc1 = add nuw i16 %val, 1
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br label %if.end
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if.end:
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%inc2 = phi i16 [ %inc, %if.then], [ %inc1, %if.else ]
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%cmp1 = icmp ult i16 %inc2, 253
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br i1 %cmp1, label %loop, label %exit
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exit:
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ret void
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}
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; CHECK-COMMON-LABEL: ret_i8
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; CHECK-COMMON-NOT: uxt
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define i8 @ret_i8() {
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entry:
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br label %loop
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loop:
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%val = phi i8 [ 0, %entry ], [ %inc2, %if.end ]
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%cmp = icmp ult i8 %val, 128
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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%inc = add nuw i8 %val, 2
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br label %if.end
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if.else:
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%inc1 = add nuw i8 %val, 1
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br label %if.end
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if.end:
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%inc2 = phi i8 [ %inc, %if.then], [ %inc1, %if.else ]
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%cmp1 = icmp ult i8 %inc2, 253
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br i1 %cmp1, label %exit, label %loop
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exit:
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ret i8 %inc2
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}
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; CHECK-COMMON-LABEL: phi_multiple_undefs
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; CHECK-COMMON-NOT: uxt
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define i16 @phi_multiple_undefs(i16 zeroext %arg) {
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entry:
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br label %loop
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loop:
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%val = phi i16 [ undef, %entry ], [ %inc2, %if.end ]
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%cmp = icmp ult i16 %val, 128
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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%inc = add nuw i16 %val, 2
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br label %if.end
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if.else:
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%inc1 = add nuw i16 %val, 1
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br label %if.end
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if.end:
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%inc2 = phi i16 [ %inc, %if.then], [ %inc1, %if.else ]
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%unrelated = phi i16 [ undef, %if.then ], [ %arg, %if.else ]
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%cmp1 = icmp ult i16 %inc2, 253
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br i1 %cmp1, label %loop, label %exit
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exit:
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ret i16 %unrelated
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}
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