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GlobalISel: Correct example PartialMapping table

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When I try to use this, it seems like the second half needs
to start where the previous part left off.

llvm-svn: 349879
This commit is contained in:
Matt Arsenault 2018-12-21 03:03:12 +00:00
parent f1446436fc
commit 76967894a6
1 changed files with 6 additions and 5 deletions
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11
include/llvm/CodeGen/GlobalISel/RegisterBankInfo.h
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@ -103,8 +103,8 @@ public:
/// Currently the TableGen-like file would look like:
/// \code
/// PartialMapping[] = {
/// /*32-bit add*/ {0, 32, GPR},
/// /*2x32-bit add*/ {0, 32, GPR}, {0, 32, GPR}, // <-- Same entry 3x
/// /*32-bit add*/ {0, 32, GPR}, // Scalar entry repeated for first vec elt.
/// /*2x32-bit add*/ {0, 32, GPR}, {32, 32, GPR},
/// /*<2x32-bit> vadd {0, 64, VPR}
/// }; // PartialMapping duplicated.
///
@ -118,14 +118,15 @@ public:
/// With the array of pointer, we would have:
/// \code
/// PartialMapping[] = {
/// /*32-bit add*/ {0, 32, GPR},
/// /*32-bit add lower */ {0, 32, GPR},
/// /*32-bit add upper */ {32, 32, GPR},
/// /*<2x32-bit> vadd {0, 64, VPR}
/// }; // No more duplication.
///
/// BreakDowns[] = {
/// /*AddBreakDown*/ &PartialMapping[0],
/// /*2xAddBreakDown*/ &PartialMapping[0], &PartialMapping[0],
/// /*VAddBreakDown*/ &PartialMapping[1]
/// /*2xAddBreakDown*/ &PartialMapping[0], &PartialMapping[1],
/// /*VAddBreakDown*/ &PartialMapping[2]
/// }; // Addresses of PartialMapping duplicated (smaller).
///
/// ValueMapping[] {